This is an all-black version of the PH2.0 Pigtail, with 10cm of wire. This is a soldered (not crimped) connection for best conductivity. Made with 22 AWG wire.
Because this pigtail does not use the conventional Red and Black wires to signify polarity, its VERY IMPORTANT that you make sure you're always connecting + to + and - to - in order to avoid damaging your hardware. If you're not sure, ask a friend, or double check with a post on the TW Facebook group. Here's a handy image to help: