If the car was starting before but doesnt work after messing with terminal

all 3 of the wires for the positive terminal and the kill switch wire were working. but then it stopped working is it a problem with the cable the battery the starter or what?

i saw the starter could be a problem cause the lights are working and power is working but i dont even get a click so maybe it just got a loose wire? any other ideas?

First, let's identify these 3 wires, 1 wire is connected to the alternator for the alternator to charge the battery. Another wire is connected from the battery to provide power to other utilities, lighting, fans etc. The 3rd wire is connected from the battery to the starting motor. If you don't hear the 'clicking' noise from the starting motor. This means that particular path is the troublesome one. Check the wire for disconnection, breakage or loose etc.

I've had this problem for me one of the wires had a short in it so it worked if you moved the wire into just the right position ultimately I just had the wire replaced in less than 5 minutes