I wanted an easy way to check the battery voltage when on the road. When thinking it through, at first thought near converter would be easy but decided easier access would be in the port side LP tank compartment. Near battery connections, no key needed to check, and near my TPMS repeater. The repeater was mounted above the batteries and array of relays so it would have a straight shot from the tire monitors to the truck.
There was a large 1"+ hole above the LP tank that was convenient for the meter. I also wanted to add switches to power off the repeater and meter. I poked around AMZN for the meter to find one that would fit the hole and found switches also. I had to add some conduit washers to make the meter fit. I was able to tap off a lug of one of the 40amp breakers.
Meter -
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
Switch -
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1