The relocation kit is a separate kit. Everywhere in the parts catalog it says you need it. The problem is that it is made for the regular RG's. The main bracket fits right in the middle of the left tail light on the SERG. The bad part is that you need the rest of the parts to make it detachable. I had to bend the original L bracket slightly to allow the barrel adapter to fit. You also have to loosen the original assembly to get more threads out of the top to get the barrel adapter to seat.
I thought about this before and got a electronic antenna and installed it in the fairing to do away with the rear but 1) i received excessive noise from (of all things) the brake system. When I put on the brakes I would get buzzing. It was weak where it should have picked up. I soldered a new ground for the shield but it did not help. I used the Dakota Digital which came recommended. 2) Holes are pre-drilled for the antenna mount on the tour pack. Gave some thought as to how to cover up but did not come up with a happy solution. I thought of using Silicone sealant, tape the outside, fill it and when dry, remove the tape. Then use touch up paint to match. I said the hell with it and used the HD kit.