I am thinking of installing a Battery Master so the starter battery can get a charge from the solar panel. As I understand it there are three wires, one to the +ve leisure battery, 1 to the +ve starter battery and one to common earth. The motor home has a Nordelettronica distribution thingy which has three terminals marked J1 - Starter battery input, J2 - Service battery input and J3 Negative (See photos). My question is will the battery master work if I connect it direct to these three terminals ?