For Toyota Engine Cover,
6mm Hole Push to lock Clip.
2 Versions of design.
One on Print, One experimental. The "Straight Up" one is poor quality of my RepRap, I may do a re-work which uses 3mm filament to clip it ni place. Straight up also broke its pin as I removed it from the bed. D'oh.
The V2 is on print now. Try the combined STL.
I will update.