Connect cables from solar closer to converter than batts?

Thanks again but I hosed myself. I got the controller installed and wired to the battery cables and was going to hook up the solar panel to make sure it worked before I stuck it on the roof and I got the wrong connectors on the extension. I noticed about 30 seconds after I cut in in half. Now I've got to order a new extension and try to sell the other one. Mostly I'm mad at myself because I brought the camper home mostly for this project and now I'll have to do the rest of it later.