The 21-HW is a circuit board with a NEM21 socket with solder pads to connect wires to the NEM21. The female 21-pin socket may be used to adapt a harnessed decoder such as the WOW101 or MC2 onto a 21-pin locomotive or motherboard.
To solder wires to the provided pads simply:
- Tin each pad with a SMALL amount of solder
- Strip the end of each wire and tin it with a small amount of solder
- Solder the wires in order from top to bottom as listed: