Oh ya mice got in that. I'd just get some wago wire splices. You don't need the same gauge wire as long as it's close. It's only a 12V system.
Sorry drunk here. When you plug the wires in fill that **** with silicone make it watertight.I should have mentioned. I use those connectors for lots of stuff but for outside connections I'll get a tube of silicone and squirt the fill the ports up where the the wires go in.