mxuteuk20 Pairs 22 AWG 2 Pin JST XH2.54 Connector Plug with Red Black Cable Wire Male Female 200mm JST-XH2.54

I ordered these for my Monoprice Maker Ultimate as I needed to extend some fan wires. At least for the Maker Ultimate the wires were already pinned in the correct positions. However for other applications which I imagine people ordering these for, the wires are backwards. The connectors on these don't make it trivial to flip the pins but with a thin pick or the tip of an exacto blade, it's not too hard to flip them. Unless you have a crimp set, especially if you don't do a ton of wiring like me, these were worth the small price for convenience.

Used these to make custom power cables for Geekworm X828 HDD expansion board for Raspberry Pi 4.

I purchased these to make change cooling fans on my Ender 3 easier. But these are wired backwards. It’s an easy fix. Just depin the connector and repin in the correct orientation. But it’s just something to watch for. Other than that, they worked great.

All mine had the wires/pins reversed polarity. Luckily im pretty good at removing the pins from the cavities and re-orienting them but seriously this is such a simple part cant you get them wired right theres only two wires per connector??

These are very well-made connectors. The only issue is that the polarity on them is reversed from anything that is pre-wired with these kind of connectors.

These are wired backwards. Red and black connect to each other, but a request swapped if you connect them to anything else. Wouldn't be an issue, but you can't disassemble the female socket to fix the issue.

Pins are wired in reverse

Works great for bigtree-tech skr E3 board end stop and thermistor connectors.