front bumper filler installation - which hardware to bolt to fenders and header panel?

[paradigm]

Which hardware are you using to bolt the front bumper fillers to the fenders and header panel. I see 4 holes to attach it along the fender, but how does it attach to the header panel by the grill?

I see this kit for both the front and rear (I only need the front so I wouldn't need the speed nuts)

and I see this kit from gbody parts:

 

[paradigm]

2 Plastic Push Pins to attach the filler to the header panel? - do I need to create a hole in the filler panel where I but the green box and use the push pin here?
6 x 7mm screws for the upper filler to header panel (below the headlights) - do I need to put them in the areas where I put the red boxes and use screw clips here?
8 - 10mm Headed Screws for the side filler to lower fender side - this appears to thread into the fenders.