Now you have to cut your strip, so it can fit in that small space. Thats the tricky part. Some tricks that might help you:

Don't make it to long. Theres a thicker part of plasic on the right side of the hinge. So make sure your aluminium sheet is shorter than that.

Make sure, that you can get your battery in and out without problems. So don't make it too wide.

In the end take that screw and screw your new replacement in there. If you're using thicker aluminium, you might need to change that screw with a longer one. It worked for me with 0.5 mm thickness.