Sorry for crappy phone pics, it was a spur of the moment thing to go take these pics for you. Yes, I took my bezel and radio out just to get you these pics. That's how us PA Jeepers do for one another.
Now you have this (notice the 2x 10mm bolt head screws in each corner):
Remove those screws and pull:
When you pull, there will be wires attached (the antenna wire being the shortest):
Once unhooked, you'll have this:
Your new install kit should have a frame like this for the new radio: (sorry, took this pic upside down)
and the wiring kit + the radio should have harnesses like this:
It's pretty much a match colors game (thank you industry for unifying colors, this USED to be a mess, now it's pretty simple):
Now take your metal ring and push it into the new bezel and bend the tabs to secure the head unit:
Now bolt the bezel in with the metal sleeve attached:
From there, you just plug in the harnesses to the dash and radio, don't forget the antenna,
slide your radio into place and then snap your outer bezel back into place.
Note: I didn't' finish the pics, as I was not installing that POS Pioneer in my Jeep. I have a nice ///Alpine coming, and will do better pics and a write up when it arrives if you want better pics and how to.