Before unpacking the stepper driver boards make sure that you have grounded yourself. You can do this by touching a large metal object. This is to prevent any static from damaging the drivers when handling them.

These drivers can only be plugged in one way. The fin side of the heatsink points towards the USB C port on the board.

With the board placed on a flat/hard surface, like a table, carefully push the motor drivers into their slots.

Plug the TMC5160 RGB EZ Drivers into the board as shown. They will drive the gantry motors.

Plug the TMC2209 EZ Drivers into the board as shown. They will drive the Z motors and extruders.

The extruder drivers are packed in with the print head bags.

You will have 4 for the z-motors by default and then one for each print head.

V4.2 does not require the E (extruder) stepper drivers - these are already installed on the print head tool board.