Welcome to iRV2 .
Sorry you're here with problems .
Do you have a 12 volt test light and a multi-meter ?
Any way you could post a picture of your batteries , showing the current cable placement ?
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.