I KNOW that part (electric 50 amp cord reel internal connections), but cannot tell you where the Black/Red/White connects too. When I get that part in the shop, the ONLY logical thing to do is replace the Cord Reel assbly. But, if you insist on repairing. You can connect the White/Red/Black to any of the open ring terminals. ALL you have to do when connecting the 50 amp cord is to verify that the White/Black/Red/green(ground) is to the correct pins on the 50 amp end. Red and Black are interchangeable. Doug