I was wondering if you knew what size spade terminal usually comes with the power supply?

Thanks

I'll have to look when I get home, but it has an auxiliary connection. But my thought was, instead of running a bunch of wires to it. I could connect one wire strip with multiple connections that ran to  the tree or center of the scenery and then have every electrical object connect to that. IT would seem there would be something out there already made and not something that I would have to fabricate. 

I'm new to trains and have purchased one for under the tree. I need to run power to the buildings and was hoping for an easy solution that could be connected and disconnected easily. Is there wiring kits that can be purchased. I was hoping to attach to a power rail instead of separate power sources.