Hi, I needed to hang one IKEA Skadis under another and decided to design this snap-fit connector. Print without any support. To install it put two IKEA Scadis pegboards on the floor, take the longer connector part and put it underneath peg-boards. Then slowly apply pressure until it fit into the board. Then close it from another side with a second connector piece. The connection is pretty tight so might want to use a mallet or a piece of wood to close two parts together. Be careful while moving the boards until you install all the connectors because 2-3 connectors will not sustain the weight of the boards and might break. Leave a comment if you have a question or suggestion.

UPDATE 31.07.2020

I've uploaded a new file which is version two. It combines both male and female parts as suggested in the comments. I haven't printed it yet, but the model is the same, so it should work the same way.