Belly pan mounting question

[R1pilot]

The belly pan on my '04 was mounted with an assortment of different screws by the previous owner. I got a new one and want to install it properly.

Is the belly pan only held by the 3 screws that attach it to the reinforcement plate along with two screws on either side going to those flimsy metal brackets?

Is there supposed to be anything holding it to the bumper up front? or does it just slide up? There are three holes on the pan, but I have nothing there and the bumper is sagging, see picture of the holes I am referring to:

[cobra]

I don't think there are any screws up front. Not in mine at least.

[Tbonem3]

Only 7 screws. ST6 size. Like $1 each.

[R1pilot]

Ok, so I have all the screws. Thanks for the info!

is there some sort of reinforcement that I am missing on the bottom of the bumper? As is, it kind of sags down, not sure this is normal.