71 vert wiring

Need some help. THe diagrams are not entirly clear for this car. I have several questions. On the convertible, the power top switch is mounted in the dash to the far left. TO the right is the head light switch. THere is a factory hole in the dash between them. WHat goes there?
THere is a light in a small tube that appears to have been forcfully removed from something that seems to line up with this hole. THe light is on it's own harness with a Ford part number tag that runs over to the relay board above the glove box. THe relay attached to the other end has a terminal broke off. WHat does the light do, and what wire goes to the broken terminal? See pictures.
Lastly, there is a wire coming from the trunk latch. I had pulled an extreamly long wire out cause I could not identify it. It ran to the realy board above the glove box. I discovered it attached to the trunk latch so I reinstalled it (the two plug ends mated up-plastic push pin connector). It's a single wire. The diagram does not show this, but it does show a mercury switch for the trunk light (which I do not have).

Hmmm, in one of the restoration books I looked through today, it appeared that the relay is a seat belt relay. It showed the sameconnector, but nothing cnnectd to the other end? And I did find a pressure switch type thing under the drivers seat with the two wires cut and pressed up into the springs.
THere is also a wire hanging off the parking brake pedal that is also not connected to anything. THis would make more sense if I ran that wire over to the relay, and the light came on when the park brake was set. I'll see if I can locate a dash light to replace that.
ANyone know what the wire from the trunk latch goes to?

Well, there is no cutout for the light above the glove box, so that rules that out. Not sure what the gizmo under the seat is for. Wasn't hooked up to anything anyway. Is the "Park" light the only light (lens) that was put there from the factory? By the way, thanks for the picture, it's the first one I have seen in all the books I have been going through.
I wonder if I had the actual trunk light that it would have the same push pin connectors on it and it goes between the trunk latch wire the the long wire I ran back up to the dash, with the latch putting chassis ground on one side of the light and the other end having +12v to the other side. Guess I will be making some calls today. Thanks!