As a plugin developer you can use this plugin as dependency of your plugin by adding a dependency tag to your POM.
To add the latest version of this plugin as a maven dependency, use the following:
<dependency>
<groupId>com.sonyericsson.hudson.plugins.multi-slave-config-plugin</groupId>
<artifactId>multi-slave-config-plugin</artifactId>
<version>1.2.0</version>
</dependency>