THe best way is to attach directly into one of the alum. frame/stud members. Depending on what type/weight of cabinet you are mounting, you might be able to use hollw wall anchors. Just make sure you are not using anything long enough to go thru the exterior skin. An electronic stid finder can help you locate the studs, also on cold days, you can see the condensation outline of the studs on the exterior of the camper.
as long as you are not creating a hole in the exterior fiberglass, there should be no cause for a warranty issue. The pantry mod pixs start here:
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Good luck and let me know if you have any other questions.
