Automatic or manual trans?
If automatic, check and/or replace the little bulb that lights up the PRND21 area from underneath. If a manual, check that those two wires that would go to the PRND21 light bulb are still taped off and tucked away so not to short to anything. Or use them for some other powered contraption of your choosing.
Console clock works? Now's a good time to take it out and clean it up or replace it with a working one.
Check down around the shifter for debris or dead bugs or whatever. You should also have a rubber noise insulating cover piece. Check condition, replace if you choose.
https://store.delorean.com/108903-ma...-isolator.html
As you mentioned with your antenna not working, see what else got inadvertently pulled out or disconnected while you're back there. You can add the rubber sleeves that snug over the two air vents in the middle as they aren't always the easiest things to get aligned and slipped back in place.
Cigar lighter with lighted ring? Is yours working? Does it fit newer/deeper plug accessories? Replacements are easy to come by now, try the Vanagon one if you like.
Clean up / reorganize the rear speaker wiring that travels down the centre under the console.