In fact, the trick is very simple:
There is 2 screws that hold the drive in the front. One side of it is in a solid metal enclosure from top to bottom, but the other side is some kind of eyelet that is movable. So I use a grip to force up the enclosure. The trick is to make the eyelet so that it is at the same height as the top metal enclosure. Then I screw the drive in place with only 3 screws well tighten. I could also have make an hole on the other side for another screw, but if you don't force the disk in or out, 3 should be more than enough to maintain it in place.
I'll try to see if I can take picture of it without having to remove all the drive enclosure. But it was quite simple. When I insert the disk in, we can see that the drive is not perfectly horizontal, there is a small inclination to the floppy, but it work quite well!
There is 2 screws that hold the drive in the front. One side of it is in a solid metal enclosure from top to bottom, but the other side is some kind of eyelet that is movable. So I use a grip to force up the enclosure. The trick is to make the eyelet so that it is at the same height as the top metal enclosure. Then I screw the drive in place with only 3 screws well tighten. I could also have make an hole on the other side for another screw, but if you don't force the disk in or out, 3 should be more than enough to maintain it in place.
I'll try to see if I can take picture of it without having to remove all the drive enclosure. But it was quite simple. When I insert the disk in, we can see that the drive is not perfectly horizontal, there is a small inclination to the floppy, but it work quite well!