Hey guys I am installing a Orion 30 amp non-isolated dc/dc charger in my camper. There is an existing red wire which used to charge my battery and runs from the engine compartment of the vehicle back to the house battery which is now a lithium 300 amp hour.
Can I use the same red wire that's already running along the chassis of my car or do I need one with many more threads as I was reading online that more threads makes a better connection. And by threads I mean small wires wrapped within the larger wire if that makes sense. Photo attached.
Related question how important is it to properly torque down these wires into the dc/dc charger as I don't have a screwdriver that measures torque can I just hand tighten it pretty strongly?