I've been told you actually wire your pump to that monitor system for convenience. Only makes sense I guess.
Moving on.
What are your thoughts on mounting the grey and black to the bottom side of the trailer. Keep in mind it's not a deck over. It's 6.5' wide with now wheel wells inside. There is room and ground clearance but you would have to be very careful of 8" high obstacles.
I was basically going to self-tap into crossembers with a tap that clamps the edge of the tanks to them.
Our thought was to rock guard the tanks before mounting and placing a foam tape between the tank and the crossembers. Some metal strapping was also suggested.
This idea came up because the 10" bathroom subfloor (to hide tanks) leaves me with 2" of headroom in the shower. If I mount them under the trailer, well you see now.