I wouldn’t know how to attribute this, not understanding how “Pinterest” works, but this is a seemingly straightforward way to create a mortise/tenon joint, with wedge reinforcements, in a way that only the woodworker would know:
I would have to become more practiced at open M&T’s. I am considering draw peg buttressing for the Craftsman radiator enclosures I have to build before we move. Wood radiator enclosures are rare, probably because of the radical heat surges and the possibility of steam systems (which we have). Whe I finally install them, I’ll store the metal ones for the next owner, just in case.
Now, to look up “fox wedged” joints. Thank you for your feedback.