Removed the rear derailleur. Where it attaches to the bike, the derailleur seems bent at an angle. Will check Ebay for photos of what a rear derailleur should look like.
Checked the bike frame where the wheels slide into the slots. Left side facing front of bike, the slot is ok "=", on the derailleur side, the slot is wide open: bolting the wheel there is no bottom metal to secure the nut. When the derailleur was there the nut would bolt onto that.
Can I have the bike bent back correctly where the wheel slides into the frame?