On my Pete 335, the original owner did not spec it with a voltage meter. I'd like to add one when I put my pyro and boost on. Best to wire it directly off the main battery leads?
I think that's exactly what I would do. That way your getting information right from the source.
At batteries is best. Or off starter stud as second choice. Make sure to fuse it at the source with at min a 1 amp fuse 10amp max
Conveniently the batteries are sealed agm and happen to be under the passenger seat. Would make it easy to wire into. Thanks!