Hi, I was given a train set today by a work colleague who was going to throw it out. While he reassured me it worked ok, there are no instructions provided with it. I have created a basic circle track to test it, but discovered the transformer has no wires other than the power cord. Could somebody tell me what sort of wire I need and on what terminals these are placed. The transformer is a Power Mite code sms-pm input:240v 50hz output:12v dc 0.36a max. It has 4 terminals, looks like 2 for dc trains & 2 for ac accessories.