I'm about to wrap up my solar/battery upgrade project, and I need to move my 30A shore power cable from the existing distribution panel in the middle/rear of the trailer to the front pass through where the new batteries and inverter/charger will reside. The existing shore power cable won't reach. I happen to have on hand enough 10 gauge romex (same wire/specs that is already in place) to extend to the pass through with some wago 221 lever nuts (rated for 600v and 40A) and would with wire prices being what they are, I really don't want to drop $100 on a 50ft roll of wire to make the run if I don't have to. I'm confident in the wago nuts, they're pretty fool proof I think, but I've also never done this aside from extending a run of 14 gauge in the house for an extra outlet, for example. I was wondering if there is anyone who had done this, or something similar enough, and would have any insight from past experience, or enough knowledge about electricity in general to say one way or another that the drop in voltage by splicing an existing 15ft run to a 30-35ft run would have.