No ground screw on Amana LE8317L2 Dryer
I'd try the hole on the back, behind the white wire
I'd try threading a 10-32 grounding screw into the open hole on the back side of the wiring compartment and using that to land your ground.  If that hole's the wrong size, then I'd get a Garvin GSST and carefully drive it into the sheet metal enclosing the wiring comparment, then land the grounding lead from the cord on that.