Now we can make the connections. First I tested everything again with the bread board.
- A – Connect the black motor wire to the negative internal battery terminal
- B – Connect the orange magazine switch wire with the negative auxiliary battery terminal and one of the outer switch terminals (so not the common one)
- C – Connect the red cable of the motor to the common terminal of the switch
- D – Connect the positive auxiliary battery terminal to the other outer switch terminal
Pleased to see that it’s working I put the parts into their designated place and soldered the four connections labeled from A to D. The final result locked like this from the inside. Of course duct tape is used to secure the wires.