I had originally planned to mount the relay board somewhere in the engine bay, but I couldn't find a suitable place that I thought was protected from the two natural enemies to electronics; water and heat. I had both the MSII unit and the relay board loose in the glove box until I decied to mount them properly. I'm a little limited in my options because I have the pipedream of someday returning my Behr A/C to working condition and still have the console mouted inside.

I settled on mounting the MSII unit on the bottom of the glovebox and the relay board inside it.

Not too bad and the relay board uses one of the bolts from the MSII unit to hold it in place. The plexiglass dust cover works nicely in there.

Of course, I'm just waiting to get my car back from the shop so that I can take her to the drive-in again soon.