The wall stud I needed to affix my HoneyComb Storage Wall to is about 4cm behind it. Luckily, a tabbed insert will actually fit the honeycomb and stay reasonably well from behind, so I made a new connector to fit my purposes.
By using the included OpenSCAD file (Library for attachments required - see the remix credits) along with also included frame-long_fixed.stl, you can make your own clamp with whatever length connector you need. The rest of the necessary clamp parts (screw-end.stl and screw-long.stl) are available from the original.
Print fairly strongly - PETG and 20% infill so you can tighten the screw sufficiently without damaging the part.
The author remixed this model.
I removed the original connector and replaced it with a longer custom HSW insert made using the Updated OpenSCAD library for HSW attachments.