As far as the one that didn't have a ring around it, simply solder to the case itself. That's the easy one.
There are many threads here regarding opening the can of an LD. To fix the one with the broken anode, that will be the first step. You'll also need a fine drill bit to drill the solder out of the area surrounding the broken anode. I'm afraid I don't have any pictures of how I created a new anode for the ones that I have repaired, and I'm not sure I could explain it with all the details otherwise. It all comes down to opening the case, drilling a hole from the back to the front of the case (without damaging the microscopic wires or laser rod itself), and soldering in a small wire to act as the new anode.