I have got a Seadoo GTX 99 which Iam working on. It won’t start at the moment and I believe is the battery. In my haste to remove the old battery, I didn’t note which terminal the earth was attached to before going to the motor. Can somebody please advise me? Also I have second ski which has a new battery which I had tried in Seadoo but I only got a beeping sound and then nothing when I tried to turn it over. Again any ideas?