RE: Locating In-Bed 7-Pin
FYI For my cabover I installed it in FRONT of the wheel well and use it there for my fifth wheel. So if you think you might end up in a cabover camper in the future that might be the place to put it.
RE: Simplest battery monitor and shunt? Advice for non-expert
I have a BM2 Bluetooth battery monitor for $30. Only measure voltage but it has history trends of battery voltage. It has been very useful and even allowed me to catch a failing battery. It's really nice to check my battery state in the morning without even getting out of bed.