There are actually 4 on the little cover.
Two under the plastic ding dong.
To pop the cover off you just need to get the 4 on the cover
After you pop the little ali cover off.
Clean the surfaces with some carb cleaner on a rag.
Then apply some fresh paste and put it back on.
If you see any scratches you will need to surface it flat on a sheet of emery.
Mine never leaked but I opened it up anyway just to see what was under the cover
They dont even use gaskets any more on these parts and its still leak free found that amazing.