Replacing kitchen faucet, unsure how to remove old plate holding hoses
See the threaded tube? There's a nut threaded on that, which holds the plate in place.

Use a Basin Wrench (or any wrench you can fit in there) to loosen the nut (rotate the nut anticlockwise to loosen it), and the plate will slide out.



If the nut is stubborn, and doesn't want to budge. A good shot of penetrating oil can loosen things up.