Bikernick, sorry don't know about RK, but Scrounger I have an 09 Ultra. I asked at dealership how they hooked up zumos. Told me they went into the fairing and wired to the headlight so that power would be on when ignition is on. I wanted to wire to the "aux" rocker so that I could turn it off if not using it. The guys on this forum walked me thru it last year. There is a four pin connector under seat wired to battery. It is buried a bit down the side of the battery. I ran my zumo power cord thru the side of the fairing and under the chrome trim across top of gas tank then under seat to battery. Only had to loosen the chrome trim, it was very easy. I used a $5 volt meter and checked each pin, found one pin hot off ignition (with ignition turned on), one hot off of "aux" rocker (with rocker turned on), a ground and fourth pin is for aux brake lights if you turn yellow blinkers into brake lights. Took about 5 mins to wire my zumo into the "aux" pin and ground. Couldn't have done it without all the advice on this site. Instead of cutting into the connector, I bought the following part number, 70264-94A, it is $18. It is called a "Switched Circuit Adapter Harness". It plugs into the pigtail under the seat and splits into two connectors, allowing two accessories to be connected to the switched accessory rocker circuit. I cut one to tie in my zumo, which left the other side intact just as if i still had the original plug available. Hope it helps, kinda hard to explain. Can take a pic if you need it.