We own a 30 foot, 12 volt fifth wheel which we keep in storage. I take my batteries out after every use to take them home so I can keep them charged. Today, we went by to check on the 5er and needed...
Usually there are two or more wires to each battery post, so you need to collect them all as though they were on a post and connect the jumper clamp to that collection.
Eg, you might have only connected to the wire for the jacks or slide and not the rest of the rig.
I use vice grip pliers to hold several ring terminals together when they are not on a battery post. Jumper clamp on the vice grips.
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