Hi Jason thanks a lot.
Compass is 1.36.4 running on Mac OS 13.3.1 on an M1 chip.
So this is my database users certificates (I have two now because of tests)
I use the DB Connect button to generate the connection string which I paste into Compass
then ask for X.509
and finally select one of the certs I have generated and downloaded
I tried accessing with userid/password and that works well as expected.