Step 13: Connecting the faceplate and step-up converter circuit
B. Cut and strip the M1(-) wire to the appropriate length and solder the wire, SW1(1), and C1(-) together. This is an important connection, so make sure the three are soldered.
C. Turn the case so that the motor is on your left, and bend the cathode lead of D1, D1(-), so that it's touching an exposed part of the positive terminal of C3, C3(+).
D. Solder D1(-) and C3(+) together and trim the remaining length of D1(-).
E. Solder the SW1(2) wire to the negative bus of the faceplate.
F. Solder the wire connected to the positive bus of the faceplate to the positive terminal of the large capacitor, C1(+).