I’ve had this printer for about 3 years I reckon and it’s a great workhorse, but I get quite a lot of wiring breaking at the heated bed due to the natural movement of the bed itself breaking the wires. I think I’ve solved (or at least reduced) this and just thought I’d share in case this is happening to others.
I bought some (I couldn’t buy less than 10) 4Pin Plug-in Screw Terminal Block Barrier Connector 5.08mm off ebay - UK link below and they fit exactly into the holes in the Heated Board. This ought to stop wires bending and breaking, or at least if they do it’ll be a lot easier to fix than continually re-soldering.
Hope this helps someone,