How to pass build artifact into another job in Jenkins
There is just one workspace per project/job in Jenkins. The directories of builds contain just information about the builds and their results.
The root directories of both are specified in Manage Jenkins → Configure System → Advanced....
To deploy an artifact of a previous build you have to copy it to somewhere else in build master and access it there from deploy master later.
UPDATE:
See the inline help for Which build → Parameter Name:
A parameter with this name should be added in the build parameters section above. There is a special parameter type for choosing the build selector.
Use this Build selector for Copy Artifact instead of a String Parameter.
Add following in downstream project."Build selector for Copy Artifact" instead of a "String Parameter"
Copy artifacts from another project
Thats it. Click "Build with Parameters" and pass build number