you can still buy the correct battery cable from Mopar for around $40, it comes with all 3 wires taped together
the problem is the ground cable , if the battery cable is not attached to the engine it will not crank over , as I said the possibily now exists that you have damaged other wiring or tthe throttle cable starting the car without the neg cable attached to the engine , you need to rresize the picture smaller to load it here