I own a 2013 365BHS and recently purchased a storage slider to help organize my under unit storage. The kit requires me to drill holes through the bottom of the storage compartment to fasten the slider rails and I need to make sure that I'm not drilling into any wiring or piping. The underside of the unit is factory sealed with a solid blask plastic type product to protect it from the elements and I was wondering how I go about knowing if I'm drilling is an area clear of wires or pipe.