This was my first larger project. I always was annoyed by the loose cable Plug It adapter (491144) which is shown in the last picture. Now it's fixed to the machine and there is not the risk of hitting it with the belt during sanding. Pretty pleased with the result.
In addition a Festool replacement part e.g. # 491716 is required. This fits in the printed thing.
Support details are in the pictures.
I used Pango 2.3.0.
Some minor manual rework with a cutter was required on my first print.
I did put both parts in one file. That made it easy to print and share support structures. I could just break it into two pieces after printing.
The insert with the cables needs to be bought in addition.
There are different versions of this connector. I found # 491716 to have quite long wires.
I think # 497247 will work as well.
SketchUp 2017 Make