I just mounted my box. Took maybe 5 minutes. Drilled a couple of pilot holes in the box, slit one cover with a razor, passed the probe through. Used sheet metal screws to fasten it to it's support. Coiled the probe cable into the box, placed the transmitter box in, 4 screws in the top. Took silicone to the cover I slit.
Took longer to write than to do it.
Looks way better to boot, wife approved now!