How to deploy external maven compiled jar to business-central via BPM Suite provided API ?

Issue

• Could you please let us know the process for deploying the business process into business-central using REST API ?
• Is that possible to upload an external maven compiled jar (kjar) into business-central ?
• When we upload the jar to business-central, does business-central automatically deploys the kjar and makes the process available ?
• We uploaded project into business-central maven repository using mvn deploy command and it deployed Success. But when I start a process after that its saying the No deployments available.
• While deploying a kjar which have been built in a different BRMS or BPMS 6.x installation where the repository was of type managed cause following exceptions.

18:19:47,487 ERROR [org.kie.api.builder.KieScanner] (http-10.10.10.10:8080-5) Unable to create MavenProject from InputStream: org.apache.maven.project.ProjectBuildingException: 1 problem was encountered while building the effective model for com.sample:Project1:1.0.0-SNAPSHOT
[FATAL] Non-resolvable parent POM: Could not transfer artifact com.sample:Project2:pom:1.0.0-SNAPSHOT from/to guvnor-m2-repo (http://localhost:8080/business-central/maven2/): Connection refused (Connection refused) @ line 5, column 11 for project com.sample:Project1:1.0.0-SNAPSHOT
...
Caused by: org.apache.maven.model.building.ModelBuildingException: 1 problem was encountered while building the effective model for com.sample:Project1:1.0.0-SNAPSHOT
[FATAL] Non-resolvable parent POM: Could not transfer artifact com.sample:Project2:pom:1.0.0-SNAPSHOT from/to guvnor-m2-repo (http://localhost:8080/business-central/maven2/): Connection refused (Connection refused) @ line 5, column 11
    at org.apache.maven.model.building.DefaultModelProblemCollector.newModelBuildingException(DefaultModelProblemCollector.java:195) [maven-model-builder-3.2.5.jar:3.2.5]
    at org.apache.maven.model.building.DefaultModelBuilder.readParentExternally(DefaultModelBuilder.java:930) [maven-model-builder-3.2.5.jar:3.2.5]
    at org.apache.maven.model.building.DefaultModelBuilder.readParent(DefaultModelBuilder.java:751) [maven-model-builder-3.2.5.jar:3.2.5]
...

How to resolve this kind of issue?