There's some pictures in this old thread of a disassembled 1934 grille emblem. Note that besides missing the clamping plate the two studs appear to be shorter than they need to be - possibly twisted off (which is common) where the nuts meet the clamping plate. I believe that I have a loose one, I will check it for stud length.
https://www.fordbarn.com/forum/showthread.php?t=126220