I have the 1212 HDPVR as well... it doesnt show up in the connection wizard as well. Nor does it show up in the A/V equipment listing (I dont believe that is should, since it is a PVR capture card that shows up on the Media Director page).
I did notice that re-running the setup wizard DOES include the inputs (only after the system knows there is an HDPVR on the MD).
Other than that, the only other place I saw the inputs was INSIDE Mythtv Setup.
If you get other results than this please post what is different.