I’m trying to install an outlet in this junction box I found hidden behind a smoke detector. Inside is what looks like 3 70’s era Romex cables all twisted together by color. (3 blacks 3 whites and the grounds have a weird clamp holding them together.)
There is a light switch directly below this, which is where I think Romex Green probably goes to.
Can someone tell me how I’d wire an outlet with a setup like this?
Should I pull this metal thing off that’s holding all the grounds together?
Should I try and pigtail from each twisted connection to the outlet?