I designed this clip in order to have the additional fan easily attached in case of (very) hot weather. As I didn't want to drill holes in my caravan for the controller, I placed also the controller outside. It sits on an IKEA Skadisboard, see my other model: https://www.printables.com/de/model/909723-skadis-mount-for-caravan.
If you only want to use the fan, you could also use one or two of those clips to only hold the controller: https://www.printables.com/de/model/362984-mounting-plate-clip-for-caravan.
The screws from the Titan fan can be reused, I removed the outer aluminium grid, which has no functional use except providing the mounting points.
The author marked this model as their own original creation.