basically my issue here is I'm trying to replace the faucet in my trailer's kitchen but I've run into a problem here that I can't figure out how to solve.
This is what the end of my shut off valve looks like, and where the previous faucet connected. It used to have tabs on it to help it twist, but they've broken off.
It looks on the inside of the first one that they could connect, if I could take off the big grey part, but it doesn't seem to disconnect at all. I know absolutely nothing about this stuff so any help would be appreciated. Do I need to buy some sort of adapter? Or are they completely incompatible and I wasted my time?