Battery ground on a 208

[SandyBottom]

Hi, the mechanic that winterized my boat disconnected the ground wires from the battery. There are 3 wires. The main ground, a green and black pair and a jumper wire that I think goes from one negative terminal to the other. Can anyone confirm how I should reconnect these wires?
Thanks
Jay

 

[SkunkBoat]

yes the jumper between the Neg terminals of the two batteries and the other wires can go to either battery neg terminal

 

[SandyBottom]

Thanks Skunk Boat. That's what I was thinking but I was not sure if the 2 needed to go the the #1 battery or not.
Thanks again.

 

[seasick]

From the pics it looks like you need to wire brush the lugs. They look oxidized.
The smaller negative cable usually connects to battery 1 assuming that is the battery that the bilge feed is connected to. Although it doesn't actually matter electrically , it does eliminate a possible issue should the common large neg cable between 1 and 2 become defective.