2010 Edge radio replacement black ground wire

[mikesterthaguyy]

Hey everyone! Just joined here recently. I got a 2010 Ford Edge SE last October. At the beginning of this year, my factory radio began developing an issue with the screen where it completely dims on it's own regardless of the time of day and if my headlights are on or off. It's really bad that there are times where I can't even see the screen anymore. It's the base model radio I'm referring to. Radio still works and plays music well despite this! On top of that, I have the Sync features on it which has been very nice to have, but this constant dimming screen issue is becoming a nuisance to me. So I'm swapping it out with a new double din touchscreen model with Android Auto before the screen decides to permanently quit working. I'm putting it in myself with help from AI via ChatGPT. It's my first time doing this install. But I'm looking to get some guidance here. My ChatGPT is telling me I do not need to connect the black ground wires together like what I do with the other ones. Instead, it needs me to ground it to a metal area around the radio mount. My brother suggested the same thing too. So I took my factory radio out to identify the metal areas in the back and to see if I can find a good ground spot. On each side of the metal mount, I was able to find a screw which seems to be the perfect spot to put my black wire strands at. I also have a parking brake wire that I need to ground to so that I can utilize the full Android Auto menus among a few other things. Looking for recommendations on how I can hook my black wire strands as well as my parking brake wire onto the screw. Or if maybe there's a different way to go about this black ground wiring thing. For reference, I'm installing a Dual xdcpa10bt, connected using a Scosche FD5000SW-WM1 wiring harness with SWC interface box.