Thank you everyone for your help, this community is a blessing
The problem was 2 ground bolts on the fuse box that where not tight enough causing the car to lose basically all power, once i tighten them, everything was back to normal
I called and they said It one for a 15 and under mustang not sure why they sent it, but i did find the problem it was the 2 ground bolts on the fuse box
I installed kooks catless long tube headers on my dark horse, now i dont have power to the screen/dash, headlights wont turn on, and my key fob wont register, but you can see that it has power in other areas,
as well i have a random 6 pin connection that idk where it goes to, o2 extension are...