Screws for rubber shift boot on '65 Barracuda 4 speed

I cant tell you what is factory correct, but when I replaced my carpet with new mass backed carpet I cut the shifter opening out and put long push pins in though the carpet to locate the holes for the boot.
Then used a pencil tip solder iron to burn/melt the screw holes.
I installed the boot over the carpet and fastened with #8x3/4" screws with a small stainless fender washer.
I also have the 4 speed plate