DOUH!
OK, I'll try to respect people's time here and partially answer my own question. With a 1/8" RCA splitter adapter plugged in to the M1001, I can connect patch cables and get the Soundbridge into zone 2.
I'm still curious, why won't the AUX to TAPE analog work and is the splitter adapter - patch cables method the best solution.
I read Gonk's review of the Soundbridge M500, it seems the digital is going to sound better in any case.
Thanks and sorry for the simple question in the original post.