Installing 12 volt air horn

[fourfourto]

I looked at it this morning I see what hummer nut means if you loosen nut on battery it backs off tension on clamp It almost feels like nut dont want to back off(tight on threads)Theres no way of puting eye loop under nut.I did match nut(had them left over from motorcycle battery 10mm)solution put eye loop over nut then add extra nut .It should work fine for tap in and doesnt effect top cover of terminal.I tested horn with extra battery in garage and seems very loud 135 db cant wait till sunday to finish install.


QUESTION... does that lower grill just pop out with clips(someone here said it does) I tryed to remove and didnt want to force it.The smaller horn fits in between slots on grill bigger horn almost fits through a little force it might squeeze through but I dont want to chance cracking grill or horn ?(there is a little flex on grill) Any info would be helpfull.