I signed up here for recall alerts.
https://www.rvrecallalert.com/Default.aspx
This is good for all models of campers.
I too own a 318SAB Cougar that did not have any towel bars or toilet paper holder mounted in the camper. I asked the dealer why the toilet paper holder was not mounted and they stated that each owner wanted them in a different space so they let us figure out where we want it.
So I have mounted the toliet paper holder on the angled wall that the door is mounted on. I used two 1/2 long drywall anchors that expand. I used a cordless drill on slow speed and drilled the required holes . I then place a towel ring next to the medicine cabinet with the same procedure.
Under the cabinet by the toilet, I place a 18" towel bar cut done to 17" with a 1/2 piece of Baltic birch plywood. This is sized to fit in the space under the cabinet. The towel bar mounting supports are then screwed into the Baltic birch plywood. Grind the screw threads flush with the plywood after mounting the supports, assembly towel bar to the plywood base. Then glue the plywood to the underside of the cabinet base with clamp bars holding in place until dry.
Jim