6 amps running through a wire that is hard shorted to ground. Use a current limited power supply so the wire does not “Dynamite Fuse”
led us to this canon plug:
details about the burned up canon plug:
possibly MS3110E-22-55P(no letter suffix for standard rotation)
Amphenol ?PT00(PT02 SE is solder pot)
color: OD (E)
Box mount: MS3110 (MS3122 solder pot)
Pin pattern: (22)
Pin count: (55)?
Rotation: no letter is rotation at A
Details about Trim SB:
240, 246. Reverse polarity.
27-014 adds relay.