/diy/ - Do It Yourself

I bought a creality k1 3d printer, and they provide a jst connector, I think 1.0 based on the measurements, to attach their camera, but I want to see ifI can use my logitech webcam.
>pic related

the jst connector on the 3d printer is 5 pin, looks like two grounds, but continuity test shows they are connected.

My webcam appears to have something like that as well, a splice ground, but what confuses me is that when I disconnect the jst, and do a continuity between the jst connect pcb pin and the J1 soldered pad still shows continuity, why would they splice and solder a wire if its still connected via pcb? I am wanting to save money by just depinning the 4 pin connector and 5 pin, and put the 4 pin on the wires on the printer. Is that possible or will I need to buy a connector kit and make a 5 to 4 pin wiring adapter?