I want to build a cable to run my M1 & M3 at home in demo mode. Both
navigators use the same connector & pinout for their power (connector
P15 on M3, not sure about M1). The connector looks like a Centronics
24-pin, but the edges are more rounded. I showed my local electronic
store my M3 but they have no idea of the type.

Thanks in advance for any help.

Robin Hou