If google translate is any good here - you are asking if you can remove the cog adapter from the lid of a Jobo tank and or how to use the cog lid for manual rolling or inversion.

In theory you can remove the cog lid, but you run the risk of damaging the cog, or the lid in the process, the cog is not designed to be removed, it is held in place by pressure but is not glued in.

The easier way would be to use a rubber stopper of the right size to plug the opening in the cog.