Hi!
First you shold remove the bordcomputer(bc),take an ec-card and push it at the top-side of the bc between it and the plastic.There a some clamps you have to push and you can remove the bc,its very easy

Now you can take a look inside,i think there´s no screw

Kenwood had to remove with an special tool, two metal pull-out hooks,also you could take 2 lacing cords and push it into the left and right side at the radio,so it will unblock the clamps of the mounting frame,in one fell swoop the radio is at your hands
Keep your hair on,you will make it!