What is the part number of the (rectifier??) or part mounted on the aluminum heat sink by a screw, washer and nut. Power goes in in center contact and 12V goes out to 10 Amp from one let and 12V goes out to 55 Amp on the other leg. My Phone number is 561 247 6368 and please leave a message as to what it is in regard to: Battery Charger 66783 or email me at: 6353roy@hotwiremail.net with a schematic or answer.