Hi everyone! I'm new to the business and want to do things the best way. What's the best tool to use to splice 12-2 into 10-2 to create a hub? A soldering gun, torch, or soldering pot? Also, what is the best way to seal the connection? I've been told to use wire nuts with silicone seal, or grease caps, or heat shrink filled with dielectric grease. Any suggestions?