I recently scrounged an old abandoned Compaq DeskPro with a Pentium 3 and 256 MB of RAM. The only thing missing was the hard drive. Anyway I got a hard drive for it, but I can't figure out how its supposed to be installed, or how the last one was removed. The case is one of the old fashioned ones which lies horizontally and I only have access to one screwhole for the hard drive. I'm hoping someone has experience with these older models and could help me install the hard drive. Thank you
EDIT: Here's some pictures
1) This is the interior of the hard drive bay itself (Yes, the image is at an angle).
2) This is a picture of the one hole I have access to I would like to point out that it's too small for a hard drive screw
3) Here's a picture with both the hard drive bay and the screwhole I have access to with the floppy, zip and dvd drive shown to the right
The green thing on the top is used to hold the floppy, zip drive and dvd in place and I think it has something to do with the hard drive bay but I'm not sure what, other than blocking the only reasonably sized screw hold from being usable.
EDIT 2: I double checked how snug the hard drive fits into the bay and I found that it has at most 0.1 cm clearance meaning any clip would have to be really thin and snap into place. If someone has a picture of the clip, that would be greatly appreciated (though I doubt it sadly).