My Fuel Fired Booster Heater doesn't work!

I have the DTCs B129A-88 (LIN Bus "D" - Bus off) and B12B9-87 (Auxiliary Heater Control Module - Missing message).

The FFBH connects via LIN Bus D to the Climate Control Module.

I have checked at the FFBH connector (C1HF01A) that there's power and ground, which there is. I have checked at that connector that there's no continuity at the LIN connector between the LIN pin and ground, and no voltage at the LIN pin.

The next thing that I want to check is that there's continuity between the LIN pin at the FFBH and the LIN pin at the Climate Control Module.

The problem is, I don't know how to get to the Climate Control Module. I think it's somewhere behind the glovebox. Does anyone know how to get to it? Or should I be checking something else first?

Replying to my own thread, but wading through the workshop manual, it's not even obvious where to find it in the manual. In the manual it's shown as being removed as part of the procedure for changing the heater core, and that procedure is HUGE, including removing the dashboard.
I don't want to do that!

The CCM looks to be to the left of the centre console and should be accessible by removing the lower glove box, unhelpfully the workshop manual gives details for a LHD vehicle. Although there are still quite a few panels needing removal to gain access.