Yup, that metal peice is the coping. One of your pictures gave a good crosssection view, the first step is to remove that blue strip (put a screwdriver in it and lever the end up, wear gloves as there can be some sharp edges involved and be gentle, it's flimsy aluminum). You will now be able to see the channel through which the bolts are secured - yours probably aren't anymore but 1 might be hanging on. Be careful not to allow the peice of coping to go into the pool, it could rip the liner, if possible have someone help you - all they have to do is hold on to one end of it to keep it from going in the pool while you are reattaching it. You may have to take the liner out of the track to get the coping to go back into it's original place, at the angle the coping is now it should come out easily (if you have any trouble getting it out, just ask me, I'll tell you how to do it).
Here's where preparation comes in handy- before you start playing with it . Procure a drill, a 5/16 hex bit for the drill (one with a 3 - 6" shaft is optimal), and about 20 5/16 'tech screws' about an inch long (They have a special tip that drills through metal). Pull the coping back in place (it should have a lip that will 'lock' on the wall - if not, just keep it even with the adjacent peices) You sholud be ready to start tacking the peice of coping back in place. (The old bolts may have ripped the track a little, try to pound it down flat to the top side of the wall and start screwing) ** BE VERY CAREFUL WITH A POWER TOOL THAT CLOSE TO A POOL FULL OF WATER!!!** - I don't want you to get hurt, if at any time the screws won't go in, try another spot. Rather than trying to 'bull' the screws in, put firm, steady pressure on the butt of the drill and squeeze the trigger in 1 second bursts, this seems to facilitate the drilling action of the screw. Place the screws about 1' apart and stagger them in the track (ie #1 on the pool side of the track, #2 towards the deck side, etc) secure the 2 ends first and fill in the middle ones.
I hope this is enough to let you tackle it, if not repost and ask for whatever clarification you need. I realise that this doesn't parse well, but in the time it took me to type it, I could have made the repair and gone for a swim