I’d like to end up with the male 20x2 pin header facing dow. This is needed because I want to plug the pi zero into a custom PCB board with the pi facing up. To achieve this effect I need to use the Installation Jig with the pi zero facing down, and to hammer in the pin header (short side). Could you please let me know if this is possible? The guide only talks about the pi zero facing up in the installation jig, so I want to make sure the opposite is also possible. Thanks you.
Ok sorry, this does not answer your question, but it might be relevant to you:
In my personal experience, the hammer header is not reliable. You will spend your time hunting bugs that only exist because the pins weren’t soldered. Do yourself a favor and solder your pins.