I designed the adapter using OpenSCAD. The one in the photos was printed using 0.3mm nozzle at 0.15mm layer height. I used PETG.
Types and description links of pogo pins and Jack socked used are in the attached OpenSCAD design file.
A hot shoe adapter that allows to get flash trigger signal
Are you planning to share your OpenSCAD file? I'd like to take a look at how your positioned the pogo pins and routed the connections inside the 3D printed object.