A guide pin for a connector assembly includes a guide pin body extending along a pin axis. The guide pin body has a stem extending between a root and a tip. The root has threads configured to be threadably coupled to a support frame of the connector assembly and the tip has a lead-in to guide the guide pin body into a mounting block. The stem has slots extending parallel to the pin axis from the tip to an intermediate position along the guide pin body remote from the tip. The slots are configured to receive ribs of a driver tool used to rotate the guide pin body to threadably couple the root to the support frame.