Re: Home wiring question with romex
I say just repull the wire from the next splice point (or last splice point) and find a convenient spot for an outlet (at least 18" off the floor) or something nearby and do it up.
If you do insist on just "splicing it" go to HD and get a Carlon "old work" box, single gang, and a blank single gang wallplate matching your color wall, or not. Pull the romex parts into the box and splice em up. Red wirenuts should be good assuming its 12/14, or the Ideal Twister'sŪ in tan. Remember to twist wires with some pliers or something and get a good twist on them, THEN put the wirenut on. Unless you go with twisters, they do it pretty ok.