Art, I always read the manual...right after I try everything else and come to my wit's end. Seriously, I just didn't even think about this since the dual setup seems so common. When I was ordering the long (twisted) servo leads, almost without thinking I order enough for both servos. It was only much later that it occurred to me to wonder where I would plug in TWO elevator leads.

Anyhoo, looks like it's RTFM time. (My worst fear is that I'll discover that "you can't get there from here" i.e. that I can't do this with my current Tx.)