I cant really help you as not sure what you have, but i can say the Positive on the battery charger and the positive on the car go together same with Negative to negative, there is another way, you can charge it through the ciggerette socket if it less than about 10 amp charger, and doesn't work with ignition on, or if the battery is not under the bonnet you should find a live terminal under the bonnet, prob a stud post, or it might go to the fuse box and you can charge it from there, putting the negative on the engine or body make sure good contact...if the battery charger is more than 10 amps don't charge it through a thing wire, hope this helps..from Fred in Essex.