SOLVEDDDD!! I think this may benefit people or someone in the future, so here's a picture and description and my solution to this problem!
So, I went ahead and figured that this thing was the culprit, which is where all of the ground wires are connected. It sits right behind the tachometer. After opening up, I was disappointed I didnt see any corrosion or anything really at first glance that made me think it was bad. Then, out of just interested, I took a phillips screwdriver, and with the ignition on, I ran the screwdriver over the metal plates back and forth, and on one of the strokes, a spark came out, and at that moment I saw the headlights flash on! Needless to say, I almost s**t myself out of excitement.
Turns out the headlights came on when the gap in between the metal plate was connected by the screwdriver. So, somehow, that metal plate burst, and I have absolutely no idea what could possibly have caused it
To remedy this, I at first tried putting solder in between the gap, but that proved to be a real pain in the ass. I then found a very thin and narrow brass strip (any metal strip would've worked), and spanned it across from one side to the other. This did the trick perfectly, and I closed the cap and put some epoxy on it to prevent it from opening. As of now, the problem is solved and everything is back to normal!