Prusa Research MMU3 Manual Del Usuario página 60

PASO 26 PD-board installation
Attach the PD-board into the marked connectors on the electronics board.
Verify the PD-board occupies the two connectors on the side of the control board
and that the white connector on the PD-board is pointing inwards.
Make sure the PD-board is connected the exact same way as seen in the picture.
If you plug in the PD-board incorrectly, you will damage the electronics. Any
damage caused to the printer due to an incorrect electronics assembly is not
covered by warranty.
Don't connect or disconnect the cable if the printer is connected to the power outlet
or is powered on.
Connect the MMU/printer cable into the PD-board.
PASO 27 Preparación de las piezas de la funda textil
60
6. Montaje del cuerpo de polea
Ensamblaje Original Prusa MMU3
Para los siguientes pasos, por
favor prepara:
Textile sleeve 5x450 (1x)
Note the MK3.5 / MK3.9 / MK4
cable comes with the textile
sleeve already pre-installed.
Zip-tie (4x)