I dont want to violate any copywriten material, but if you do a google image search for 1970 dodge jack instruction decal you will find it
I just remembered I had a '70 trunk jack sticker sitting in the next room.
It shows the hook where mine is for the convertible and cuda hardtops with space saver.
For Challenger hardtops with space saver it goes on the stud, above the tire and jack base, and below the wing nut. Which is the same as where it goes when you have a full size spare tire.
The decal shows the option of having a full size spare with a convertible, I thought 'verts always got the space saver spare?