If memory serves, Niles' system is IR only, the only wired connections on any units being 12v triggers. Like gonk says, unless you want to spend the extra scratch (and you'll need to check with Niles to see if the Xantech module will even interface), the emitters are your best bet.

I run the IR wires underneath all of my units, and since the windows are typically on the bottoms of all my equipment, the flashers are hardly noticable.