Sorry I haven't replied to this... I found the people I purchased the controller and pigtail from did not send me the right pigtail. I swapped it from someone local and it plugged right into the gray harness in the upper right of the picture.
BTW I used it this past weekend and it is a ton better than my old Tekonsha Voyager... this controller works very smooth. I mounted it in the cubby just to the right of the steering column.
I am putting my 520xl CB on the flat surface below the cubby. I mounted a 4' Firestick II to the drivers side mirror with a quick disconnect and clamp mount. I basically threw the CB in for this weekend and will clean up the install later.
