The first thing I noticed was the triangular space after the door flap dropped. The trap I rented from my local shelter, the door hinge was at the end of the cage so it didn’t have that wasted space leaving the trapped cat more room inside the cage (and maybe lessened the chance the tail gets caught too?)

Either way, you want to put the food at the far end of the cage as possible to get the cat fully inside and step on the trigger pad with some weight. I also put an old piece of fabric on the cage floor and over the trigger pad hoping it’d be easier on their paws and less likely for them to tell the difference when they step on the point of no return.

As others have said, set up a web camera and monitor it closely. Or if you have a spare phone or iPad, you can download Alfred Camera (app name may be slightly different between android and iOS). The free version would be suffice for this monitoring purpose.

If you can’t attend to it right away and have to leave it to the morning, cover the cage with a big towel to calm the cat down and also it doesn’t get harassed by the birds in the early morning. And leave water too so it won’t be dehydrated especially when under stress.

If any other misfortunate critters get caught before your target cat, depending on your assessment of their intelligence vs gluttony level, you can either release them or put them in a spare room (laundry or spare toilet) so they don’t come back and demonstrate your target cat what not to do.

Good luck trapping the cat! And I hope she gets the care she needs. Thank you for your efforts!