Can someone help before I go crazy! I have a '56 Super 88 with De Luxe radio. Under the dash is a switch to operate the rear speaker. There are 2 brown leads from the switch and a single brown wire that goes to the rear speaker. There are red and black connections from the receiver to the front speaker plus the plug to the front speaker. But I have no spare wires to connect to the 2 brown wires at the switch. Can someone tell me where these 2 brown wires should connect?