Mitel 5448 pkm

I’ve got a Mitel 5224 phone, SIP 8.x software, works fine. It has an attached 5448 Programmable Key Module. Does anyone know the key numbers for programming the keys on the PKM? It does not appear on the phone’s web configuration “Key Programming” page, and the configuration XML downloaded from the phone does not show those keys. When I push a button on the PKM, the phone goes off hook and offers the choices “DIAL”, and “Cancel” - so the thing is alive, it just has nothing programmed into the keys.

Any chance you figured out the key numbers for PKM?