This step is tricky and you will probably require assistance.

You need to bring the screen angle all the way down. This way you'll need to exert less force against the spring, while inserting the screw.

Pass the screw through the washer, making sure the bent portion is facing the straight end of the spring.

Slowly push the screw towards its threaded base. Mind the washer's orientation and be careful. If you slip, the spring can eject the screw and washer away.

Ensure that the screw is positioned straight over the threaded base. You don't want it to start biting its way through. It's gonna ruin the threads and you'll end with a way bigger problem than you started with.

Slowly start turning the screw. It's gonna be fairly difficult. Don't stop pushing the screw while screwing, unless you are sure that you've got a couple of full turns .

Now you can release the pressure against the screw and simply keep screwing until the washer has successfully secured the spring. Don't over-tighten.