DCS AIU and LIONEL REMOTE SWITCH

C

CAMERON

HELLO-Could anyone advise on how to wire up a Lionel Remote Switch(O 27) to an AIU (DCS).There are three terminals on the switch and three inlets on the AIU for each switch.What terminal on the switch and the AIU are ground,and what terminals are power.The instuction booklets on both are vague.Please advise.Thanks.