Darn Door Latches, PITA

[Bmwtvboy]

A few weeks ago lost the passenger DHC n D.Actuator. Replaced just the DHC for now. Yesterday, driver door won't unlock/lock the car with electronic fob or the manual key insert. Had to release from inside.
Ordered a new actuator. BUT, that darn little plastic ball cap that fits on the latch release is a bear to press on. Any tool or ideas on how to press that on more efficiently? My thumb/fingers don't have the strength to press that on.
I am testing the key lock to see if that needs a rebuild. I thought it is supposed to manually unlock the driver door. It may be time to put this X out to pasture.
Thanks for all the help everyone.