I put the relay in a 10 ga. wire running from a barrier strip up by the gauges that is wired directly to the battery (both positive and ground) to a Centech fuse block under the passenger seat. Run most of the switched accessories (radar detector, cruise control, heated grips, and the outlet for heated vest) through the block with various amp fuses. I put the relay up front and used the left front running light . Next time I'll put it under the seat and use one of the rear running lights.
Don't know why but run the electrics (unswitched) to the tank bag with an in line fuse from the same barrier strip.
I think this is all detailed on WC's FJRTech web site. Ian, Iowa