Welcome to the club, not sure how I missed you joining up? But Welcome any way. I'm not sure what's wrong with the pics but you might try downsizing them. Maybe that will fix the issue. Otherwise I'm lost I'am definitely not the greatest when it comes to computers! Good Luck and enjoy the site. I see 69 Mach1 has already been helping you. All the guys here have a ton of knowledge, and are very willing to help, so don't be shy jump in anytime.
Hard to determine what that is because only part of it is visible. Might have something to do with the resolution of the pictures causing them to be larger than expected after uploading. But, from what is visible, I don't recognize it as being on a 69 Mustang or Mach 1.
To me it looks like the back cover off an early beetle dash, the part that is inside the boot area that covers all the wiring etc but I'm not sure if it is long enough?