seat cowl

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...

Been looking around and cant seem to find a confirmation that previous year seat cowls will fit the 2017 seat. I remember reading that the seat itself is the same (could be mistaken) but if so...should it not fit?