Installing Solar Panels...... wiring location question

I’ve installed solar panels on all of my toy haulers and Lance campers by running the wire from the roof down the refrigerator chute to the battery bank. On my “new” 2012 Itasca 30’ rig the refrigerator venting is on the side of the coach, and not on the roof. I need a chute from the roof to the floor to run the wire or an other option.

Have any of you done this modification of adding solar panels to the Itasca or similar rigs, drilling through the roof member and then running the wire down the wall area, or chute to the floor, and then of course, under the floor to the battery bank?

Looking for ideas...... thanks!