YO, here is what I did. HD makes an antenna relocation kit but it cost $99.95. The kit is on page 503 of the parts and accy. book (2004). Inside the kit is and cable adapter ( have the part number but have to dig for it, dealer can find it if you ask). Since my tour pak already had the antenna cable and mount installed, I just purchased the adapter for about $20. What I do when I put the tour pak on is to remove the antenna and then unscrew the cable from the exsisting bracket. Screw on the adapter to the cable and then attach the cable from the tour pak antenna. Attach the antenna to the tour pak. I use a plastic wire wrap or tie to secure the cable under the tour pak so it does not rattle or rub the saddle bag or fender. This solution cost me far less than the $99 but is about 3 minutes of work each time you switch between the pack and or backrest. Sounds funny after spending $30k tryin to save a couple bucks here and there. I guess its a matter of how much you plan on taking on and off the tour pak and if ya want to switch the cable and antenna. Take note: if you decide on this solution beware the tiny allen head screws are very easy to loose that secure the antenna. Good Luck!