I Ssume the prior owner set up the post as he installed the stereo system n the glove box. Do you have any idea what car this post part is from?
LOL! I can not see your car! But my point is not that this "post" is a bad design. There are many good ways to make a connection through sheet metal wall. My point is the circuit is badly designed. Try to understand what is here. Start with the link with Nacho's drawings. Then make your own drawings. Use one of ours as a start if that is easier.
