I'm wiring a Digitrax PM42 (4 circuit breaker board) and want to know two things. First, what guage wire (stranded/solid) can I use to wire the 44-pin connector? Is 18 g solid sufficient for input and output? Seems the connector has some pretty small soldering tabs for much else. Wondering about signal loss/amperage capability. By the way, I'm using terminal strips to keep wiring organized. Secondly, instructions say to ground the unit to the booster case; however, I'm using an NCE Power Cab instead of Digitrax. What's a suitable ground therefore?

Thanks!