I am retrofitting an Elac Miracord 10F tt (from a late 60's Fisher console) into a 1958 Fisher 610 consolette, replacing the original Garrard RC121. The original TT has a 2-prong power cord that plugs into the amp. Can anybody tell me which 2 terminals on the Elac's connector (see pic), that I can use to attach a power cord? At the connector there is one to gnd, 2 from the switch, and one from that round black gizmo next to the motor. Thank you!