That’s interesting — the “normal” homelink mirror clearly also requires you to be in park to program buttons, but, per the diagrams above, it does not receive that information via canbus. Sadly, I don’t know enough about canbus to know how it works, but given the diagrams above, it looks like you can plug those two mirror wires into the canbus connector, and that the pins don’t matter. This suggests that if there are open pins on that connector, one might be able to try it and see if the information is passed along to it. My guess (and this is a total guess) is that it would be, since it is likely that many other canbus things also rely on the car being in park, so as long as the mirror is connected, it too should be able to receive the info… might be simpler to try that than to try to bypass the check in the mirror.
