Hmmm....found a user's manual online after some searching, but it's silent on the pin out of the cable. A better approach would be to find the part number for the power cable, then figure out which models it would work with to broaden you search. For example, I figure the Ultra power cable will fit the Ultra, Ultra II, Ultra II Plus, Ultra Plus, Ultra Map, Ultra Nav and Ultra Nav II. Probably some others as well. Unfortunately, I can't verify my list as I don't see a power cable listed as available for the Ultra on the Eagle Site.
Accessories
Wannabe...