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From the parts photo Mike sourced, the decal goes on the fuel tank cover on the area where there is no non-skid. I have the same area on my fuel tank cover (Outrage 17) but no decal.
I would suggest it is 2/3rds up from the back and amidships, slightly behind where you would stand at the console.
+1 to what Phil said. Clean the area well and place the lable so you are facing fwd when reading it. The other "NO DRILL" goes on top the small covers for the fuel lines on the port and the wires on the stbd