Advice about 14185 - TMCC Operating Track Controller ?

Watched the instructional video. Looks like it will do what I want....question about how many. It says will do 4 uncoupling tracks or two operating tracks. So, I'll need two for four operating tracks?  Do they hook together in some way? Are there printed instructions anywhere? 

If you have two of them, you just address them individually, no need to hook them together.

Thanks, gunrunnerjohn. I am discovering more about my confusion. I have been looking in part at this original "The Complete Guide to Command Control" that came with my first TMCC locomotive. It is copyright 1995 and says things like: "You must operate UCS/RCS uncouple/unload tracks with their original equipment controllers, not with SC-1s."  I'm realizing that I have missed out on a decade or more of TMCC development!   (Just what, or was,  is an SC-1, anyway?) OK, I'll catch up. I get it now. You wire the operating tracks to the "OTC" which receives the signal from the Cab-1 to activate the track. Power goes into the OTC from an accessory transformer.  I'm going to get one and see how it goes.

Yep, the SC-1 is a low current device that is primarily useful for switches and low current accessories.  It has very small TO-92 triacs in it, I think they're the same ones that are on the R2LC board for lights.  They handle around 400ma, but the operating track or uncoupling track can draw several amps.  OTOH, the SC-2 could be used for these, it has 15 amp relays, so it'll pretty much handle most any accessory or something like an uncoupling track.