WANTED: FLIP TOP GAS CAP LOCK --- BARRACUDA/CHARGER

Can somebody post a picture of this locking cap in place? I'm having trouble figuring out how the flip top closes once it is installed...
This is the only lock that works for the 67-9 Cuda and 68 69 Charger. Won't fit any other flip top gas cap.
They sell another that looks like a basic gas cap lock, but you have to remove your spring for it to work, which of course, they don't tell you before you purchase.