mvn build keeps checking nexus repos not matter what I put in pom file

I am trying to access some jar files by including dependencies in the pom. The problem is I get error not found in my corporate nexus repo. How do I tell Maven not to look only in http://sl-quality.mycompany.com/nexus/content/groups/public/ for the dependencies? And where earth is the url defined?

 Could not resolve dependencies for project com.mycompany.myproj:mycompany-service:jar:1.0- 
 SNAPSHOT: Could not find artifact io.confluent.ksql:ksqldb-api-client:jar:0.11.0 in nexus 
 (http://sl-quality.mycompany.com/nexus/content/groups/public/



<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
   http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>

    <groupId>com.mycompany.myapp</groupId>
    <artifactId>com-mycompany-app</artifactId>
    <version>1.0-SNAPSHOT</version>
    <properties>
    <ksqldb.version>0.11.0</ksqldb.version>
    <!-- Maven properties for compilation -->
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    </properties>

    <repositories>
        <!-- jhipster-needle-maven-repository -->
        <repository>
            <id>ksqlDB</id>
            <name>ksqlDB</name>
            <url>https://ksqldb-maven.s3.amazonaws.com/maven/</url>
        </repository>
        <repository>
            <id>confluent</id>
            <name>Confluent</name>
            <url>https://jenkins-confluent-packages-beta-maven.s3.amazonaws.com/6.1.0-beta200715032424/1/maven/</url>
        </repository>
    </repositories>

    <dependencies>
        <dependency>
            <groupId>io.confluent.ksql</groupId>
            <artifactId>ksqldb-api-client</artifactId>
            <version>${ksqldb.version}</version>
        </dependency>
   </dependencies>

I have no idea why it always goes to nexus as this is no where mentioned in my pom file. I could install in my local repo but not sure what app jar files need to be pulled for it to work as two repos needed to be added.

I would like to know exactly what jar files i can extract to put in my local repo. Thanks

Repository is generally configured in your settings file located in C:/Users/Youruser/.m2/settings.xml on windows

Check the mirror and corresponding repository tags for example - your settings.xml will probably look like this

 <mirror>
   <id>nexus</id>
   <mirrorOf>*</mirrorOf>
   <url>http://sl-quality.mycompany.com/nexus/content/groups/public/</url>
 </mirror>

Change this url to point to another repo, perhaps an external non corporate one such as http://repo.maven.apache.org/maven2

EDIT:
I think this is what you want

<mirrors>
  <mirror>
    <id>nexus</id>
    <mirrorOf>*,!ksqlDB</mirrorOf>
    <url>http://sl-quality.mycompany.com/nexus/content/groups/public/</url>
  </mirror>
</mirrors>

 <!-- Add repository for your other repo to filter on above -->
 <profile>
  <id>nexus</id>
 <repositories>
    <repository>
      <id>ksqlDB</id>
      <url>https://ksqldb-maven.s3.amazonaws.com/maven/</url>
      <releases>
        <enabled>true</enabled>
      </releases>
      <snapshots>
        <enabled>true</enabled>
      </snapshots>
    </repository>
</profile>

</profiles>

<!-- add at bottom inside </settings> -->
<activeProfiles>
 <activeProfile>nexus</activeProfile>
</activeProfiles>

Add more repos as needed and filter above where necessary. I believe (not tested) that you can apply the same exclusions to mirrors instead of repositories personally I prefer using repository tags and having profiles setup.