So, im installing a sub setup, and i have everything wired up except for the RCA that goes to the head unit? i can figure out how to get it out. There are 2 screws under it but i wasnt sure if those were the right ones. Can anyone help?

98 Black Mystique; Duratec/ATX
"Mystique, the luxury SVT"

P.S. This is what part of the alphabet would look like if the letters Q and R were omitted...