I am currently using one of those on my foldable Lensun 100w panels. I have attached it to the back of the panels via heavy duty velcro tape and running an extension lead to the leisure battery (which is underneath passenger front seat). The reason for this is that it gives me an option to track the sun. The controller is rather heave and sagging the panels when on their folding stands, so I am thinking of detaching the controller from the back of the panels and locating it in the van instead. I was thinking of having it fixed somehow underneath of the glove compartment? Any thoughts?
Given that my LB is underneath of the front passenger seat where would I put/fix the controller (in this option I would have a shorter lead connection to the battery) and longer cables from the controller to the panels instead (totally opposite what I have now, longer battery cable and shorter panel cable).
Also, can the controller be permanently connected to the battery (yes I do have fuse already between the controller and the battery as advised by @Dellmassive previously), as currently I unplug it every time as the controller is attached to the panels?