battery sw/aux start solenoid

[BillPig]

I have a 1978 42c with 671. I intend to install battery on off sws [missing] and return the battery paralleling system to working order. First question is what amp sws should I be using. I have a diagram that showes two aux start solenoids and one parallel solenoid and A sw on the bridge to chose port or starboard batterys. I believe the sw can select the aux solenoid on the good batt which will energize the parallel solenoid. Would be interested in any comments on this circuit and what amp parallel solenoid should be

[dshuman]

I'd call Steve McPherson at Sam's Marine (this site). He either can find the answers and maybe has the parts or can tell you whom to call. I believe he was the Parts Dept Manager for Hatteras for many years, and is very helpful.