'65 Barracuda w/AC Firewall Insulation Pad Kit Puzzle

I don't claim to be quick putting puzzles together, but when they don't fit it becomes frustrating. I am beginning to belief I purchased a kit with five correct pieces (parts #A,B,C,D, & E) and one alien piece (part #F)?

firewall pad 7.JPG

firewall pad 1.JPG

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firewall pad 5.JPG

firewall pad 6.JPG