While creating other models I came up with my own solution to connect 2 separate parts with a double sided clip because pins broke too easily.

Fit it super tight, it did not break for me when installing.

Bottom part is basic, top part has 0.2mm gap to compensate supports. Added step model so you could download and scale it or change it as you want let me know if you need other formats (I made it with Fusion360). 

Print as in my profile, clip has to be layed on the bed.