5. We chose to mount our Mojave Heater directly on the transmission tunnel. Unfortunately, our tunnel was just an inch too skinny to thread bolts into the fastening holes on the Mojave Heater without them hanging visibly down. We instead got really generous with double-sided sticky tape and went to town making sure this thing would hold to our floor. So far, it's held really well. The key to successful sticky taping is the cleaning prep of the surfaces.