xsr900 cafe tail

Hi, I am buying a seat cowl from an XSR owner that had it come with his bike from the dealer. He is missing 4 inverted screws. My pic won't upload but it's the 4 black screws (2 big and 2 smaller) in the image with all pieces. Anyone know what they are used for and/or where I can get them...

I haven't seen any posts on this yet, but I stumbled on this new Yardbuilt project. It's not in English, but for those of us that just look at the pictures... Nice Yardbuilt Yamaha XSR-900 ABS Cafe Racer Project | triumphbikes.de |