So once I pulled my gloves off, the sockets worked fine. But I'm glad I had my Dad's old rachets. There's not enough room for a rachet bigger than the diameter of the socket. And I needed a shorty for the bolt in the back.
2 17mm bolts to loosen- one in the back, one in the front. Then the 13mm "tightening bolt/adjustment bolt".
Now my battery can get a good charge on.
Thanks for the help and support.