Well in the map t2_rancor there's a rancor spawnplace on a liftplatform.

As I am pretty sure they didn't make a platform which even could go down, as it's modeled beyond it as well, for nothing, I thought there must be a way to activate it.
Poorly I never found out how, I even tried to find it out with a mod but I couldn't find it.
Well anyone ever found it out? Would be great to know how to make the rancor not being able to attack anymore, just cause of fun .