The fender eyelets on the dropouts are used to mount the vertical rack supports and the fork center hole provides the mount for the stainless steel bracket. This is how I have my front rack on my Cannondale, albeit being mounted to a steel fork. However, the thicker fork blades may necessitate the use of a longer bolt with a spacer. This is the typical front rack mount, not to be confused with a lowrider rack mount. That entails brackets to grab the fork blades. Touring forks have threaded braze ons or through holes for lowriders on the fork blades mid points.

Is there a reason you want a front rack and not just a handlebar bag? Alternatively, why not a rear rack? Pretty sure all Cannondales have the needed braze-ons for quick rear rack mounting. My two do.

I hope this helps.