Link UART of TMC2208 or TMC2209 to Trigorilla board

For TMC2209, you will need to cut 3 pins, like this :

Then you need to wire the 4th pin (Tx if I remember well) to your board.

There are some pins available on the Trigorilla but I had to solder 1 extra header to the "servos" which are not soldered :