MHX MXNT Transom Mount Hardware f/MEGA Transducer Emergency Kits The universal security pin is

The universal security pin is commonly found on refrigerator doors

DIMENSIONS: 6 1/2" L X 3 1/4" W X 2 1/4" H

and the bottom compartment has separate

The outer panel has some pitting on the fiberglass and a hole that appears to have been filled (as shown)

MHX MXNT Transom Mount Hardware f/MEGA Transducer Emergency Kits The universal security pin isMHX MXNT Transom Mount Hardware f MEGA Transducer Stainless Steel mounting hardware for the XNT transom mount transducers. WARNING: This product can expose you to chemicals including LEAD which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov.