Gas Cooler

Well I bit the bullet and bought a Shark 10 from absolute (price was AWESOME for engine/pipe combo) and it came with the RB gas cooler. In looking at the package for the cooler everything looks straight forward except what I can assume is the "dust guards". They look like they press into SOMETHING and have 1 or 2 solid nipples on them. Can anyone shed some light as to where they go and what they really do???