I also added an external "F" connector through to the entertainment center on my '04 Mountaineer 305FKS. Install is really simple - ditto on the shock factor of penetrating that pristene fiberglass sidewall though !
One tip - a good electronic "stud finder" will steer you clear of the aluminum studs in the side wall.
Remember - measure twice, drill once!!
Also, a small quantity of RTV sealant under the exterior connector weatherproof housing for moisture control.