The Proto FeatherWing is setup with 12-pin and 16-pin female headers. The Feather M4 Express will have a male strip of headers, 12-pin and 16-pin respectively.
The slide switch is wired up to a piece of ribbon cable with two connections going to the middle pin and either side. The wire was peeled off from a roll of 10-wire ribbon cable. The cable length is approximately 5cm (2in) in length.
Wiring JST Cable
A male (socket plug) 3-pin JST-PH cable is setup to connect to the Proto FeatherWing. This wire was peeled from a roll of 10-wire ribbon cable. The cable length is roughly 8cm (3in) in length.
Wiring Proto FeatherWing
The slide switch and 3-pin JST cable is soldered to the bottom of the Proto FeatherWing PCB.
The slide switch is wired to the EN and GND pins on the Proto FeatherWing. The wires are soldered from the bottom of the PCB. Reference the pin labels on the top of the PCB.
3-Pin JST-PH Cable
The 3-pin JST-PH cable is wired to 3V, GND and D6 pins on the Proto FeatherWing. The wires are soldered from the bottom of the PCB. Reference the pin labels on the top of the PCB.
A 3-pin JST (female socket) cable is wired to the 5V, GND and DIN pins on the NeoMatrix PCB. The red wire is connected to the 5V pin, black to the GND pin and white to the DIN pin on the NeoMatrix. The wires are approximately 5cm (2in) in length.
Double check the wiring is correct. Pieces of heat shrink tubing can be used to keep the wires bundled together.