Gen2 Quick Connect Lynch Pin Upgrade Kit.  Includes drill bit to complete the drilling operation at the bottom your Gen2 3/4" pole.  
 
Instructions:  (If attached) Disconnect your transducer adapter from the bottom of the pole using the appropriate hex wrench. Load drill bit from this kit into your drill; when ready, stick the drill bit through the hole that would be normally used for attaching the transducer adapter (best to use a shop vise when performing this action).  Ensure the drill bit is as straight as possible and then complete the drilling operation.  At this point you will now be able to reinstall your transducer adapter and place the lynch pin though the aligning holes (in the pole and the adaper together) to connect everything together.