Hot glue the actuator wires right at the body opening to avoid breaking the wires right at this spot from manipulating the part.
Cut the actuator's wires to exactly the following lengths, measured from the tangent of the edge of the body:
Red -> 19 mm
Black -> 12 mm
White -> 20 mm
Super-glue a diametrically polarized magnet to the 3D printed adapter.
Press-fit the adapter to the hallow shaft in the back of the actuator, make sure the magnet does not wobble or looks uneven.
Note: This is me from the future, make sure to super-glue also the adapter into the hallow shaft, press-fitting cannot take the movements of the quadruped and loose magnets were a huge pain point in the future.
Grab an Actuator Back Plate A and populate the M2.5 screws for the shoulder/hip, or populate the M2.5 and M3 screws for the knee actuator. Make sure to use medium strength threat-locker on all screws (I've been using orange Permatex Threadlocker with great success).
Solder a 2x4 programming header to the Dagor Controller, straight connector for the hip and shoulder actuators, 90 degree connector for the knee actuators.
Cut the respective length of 18 AWG silicon wire for the power input of the Dagor Controller:
Knee -> 350 mm
Hip -> 80 mm
Shoulder -> 280 mm
Solder the power wires to the Dagor Controller with the wires coming from the top of the board.
Solder the motor phases U, V and W to the Dagor Controller board, red wire being U, black V and white W, with the wires coming from the underside of the board.
Secure the board to the actuator plate A with 4x M2.5 x 10mm screws. Make sure to not over tighten to not stress the board, the screws touching the board is enough.
Connect the WiFi antenna to the ESP32 on the Dagor Controller board.
Screw down the Back Plate B to the Back Plate A with 7x M2.5 x 16mm screws, make sure the Plate B corresponds to the correct actuator (hip, shoulder or knee). Do not over tighten the screws as the screws thread into plastic. For the knee actuator, do not screw the Plate B, because this plate has to be screw down to the hip actuator first and then screwed to the knee actuator.