I’ve cut aluminum plate with a straight edge and circular saw with fine carbon tooth blade. I use the same type blade on my miter saw for cutting aluminum square tube, angle and narrow flat stock. Just cut slow.
Good planning. My original plans was 25-26’ length but thought about staying panel length as well. I’ll put a 6-8’ porch on the long side as it will be the “front”
You run the cables thru stock holes in the floor with provided grommets. Then seal with silicone - not provided.
I have these on my 2.5” lifted, 35” tire, Texas Trail diesel.
More than likely, your wiring that came with the light has a relay built in it. You can remove all the wiring other than a ground from the light and the power wire (wire only) from the Aux switch wiring to the light.
The Aux switch system already incorporates a relay and fuse.