Job done. Many thanks.Tesla.com bit is just a push fit. Pull gently from one side and work your way across. Plate slides out and back in and replace the Tesla.com bit.
For the present I put the plates on that came off my old car. I’ll source some proper ones when lockdown permits.
God! Those plate holders are junk. The chief of Design must be vomiting in his steak!
I’ve never seen plates put on with self drilling self tapping screws!