What it is

I wanted to get a more realistic car experience for driving lessons and decided to mount an actual turn signal lever (wiper) onto my Logitech G25 wheel base.
It may fit other Logitech Gxx models, but I cannot verify.

The turn signal lever I use is one of the cheapest I could get my hands on and probably they all have different mounting options. See attached photo.

This object was made in Tinkercad. Edit it online https://www.tinkercad.com/things/kwFxGQTCb26

Fitting the mount

Due to the curved surface of the wheel base and shape of the turn signal bottom you will have to cut out a rectangle to place the protruded connector.

What you'll need

4 x M4-15mm
4 x M4 nuts
M4 washers

Preparations

Print the mount with supports and check that your turn signal fits inside (side clips should click when installed in full depth) and M4 nuts fit inside respective side slot.

To properly trace holes you would want to also print the hole tracing pattern. The tracing pattern is provided as separate file and should be printed upside-down. Contrary to the model itself has a pivoting circle. Put the circle around the bare wheel column (without wheel) and mark holes accordingly.

Tracing holes and voiding your warranty

Once done proceed in following steps:

1. Put the hole tracing model's circle over the wheel column base.
2. Trace the rectangle hole inside the pattern and mark centers of at least 2 screw holes. One screw hole is made for precise fit, while the rest are made to be adjustable slots in case you somehow screw it up (as I did during prototyping) and screws become a bit misaligned.
3. Drill screw holes and cut out the rectangle you just marked (this is where your Logitech warranty gets void)
4. Put your turn signal lever into the model and screw with M4 bolts.