s13 blower motor ?

[skyline084]

On the blower motor, there is a flap that opens and closes with a metal lever to hold it in place.
It looks like mine is missing the screw that holds it in place though.
How does that assembly work? b.c if I put a screw in it.. the door won't swing open or closed.
here's a pic of the screw, sorry it's off phone

[OutToWinPAHC]

There are detailed drawing in the FSM