The back is similar to the front no hinge attachments that i can see. The hole was drilled from back to front i thought it might be a bullet hole at first but the more i look at it i looks like drilling burrs on the front. The piece is about 1/16" thick. i thought maybe drawer pull but the hole is off center and drilled from the back but i see no attachment points at all has me scratching my head lol
A playing card, especially the Ace of Spades used to be a popular target for .22 target shooting but have never seen anything like this. It was a good shot though.