I’m trying to install a wall outlet where 3 Romex cables meet and are twisted together. Which goes where?
If everything worked correctly before you disconnected everything, then hook your blacks together with an additional 6&quot; piece of black wire. Do the same to the white wires using a 6&quot; piece of white wire. Remove that clamp from the grounds and wire nut then together with a 6&quot; bare or insulated green wire Now take the black pigtail and connect it to either 4 or 5 in your picture. Connect the white pigtail to either the 1 or 2 in your picture. Connect the ground pigtail to 3. Your box fill will be OK with either #14 AWG or #12 AWG.
Oh, and you get a gold star for taking a picture before you disconnected everything.