Okay fess up, who did this

My high school buddy did stuff like this but his was permanent. Alarm, amp, PA, it was a bird's nest under the dash and this gave me a flash back. Duck tape everywhere
Ok maybe someone can help with wiring. My car is as bone stock of a chassis as you can get. No aftermarket anything. Completely disconnected the alternator unplugged the MSD, pulled out the dome light bulb, no trunk, hood or glove box lights. Have a 10V draw with the meter between the cable and battery post. Just got a load of new fuses today so I’m going to start pulling one fuse at a time. But I have heard of other people having this problem. Is it a common problem.