On my module I want to have plug-in cabs. I have a Prodigy Advance Unit by MRC and it looks like the plug-ins are just catagory 5 RJ plugs as used in networking. I went to my local train store and the guy there said he didn't have a clue . . . He was no electricion? I thought that was rather strange since he sells and recommends them. Anybody know? I bought some passthrough jacks to use but am not sure if they will work. They are 8 wire like the Prodigy ones.