Okay, so I went on E-bay to get one of these FMS/cable packages, but I don't see where it plugs into my TX. I just bought the Futaba 7CAP yesterday. Looking at the pictures they (e-bay sellers) have of the cables, I don't see where it plugs in. Their plug is round and the only thing I can see on the back of my TX is squared off. Is it supposed to plug into the same place as the buddy box? I'd think they'd make the 7C interface the same as that on the rest of the Futabas. Is the 7C's interface different than all the rest of the Futabas? Do they all have a circular interface and they changed it to squared-off for the 7C?
Man, the pictures came out blurry - it was hard to focus on that plug-in. Hopefully you can tell what I'm talking about though. If you can't, maybe I can get some better pics.
The plug on the back of my TX (sorry it's so blurry):

My 7CAP:

An Example of a cable being sold on e-bay claiming to fit Futaba radios:
Patrick