Aw I'm too late. When I saw op I was trying to figure it out, the part throwing me off was how the front of the block, the top part extended upwards, but near the back it didn't extend straight down, but at an angle, that's what made me think. That has to be where it's cut out only to where the camera can't see.
I just figured that was the case but didn't think it was true. Thankyou for making me like I'm worth a damn