ok Great !
Looking at the plug end of the cord as shown in the photo the far left and right FLAT blades are L1 and L2
L1 is Black wire And L2 is the Red wire.
The center lower L blade is Neutral White
The center top Round blade is Ground.
So now to the rear of the dryer to hook the wires up .
It should have a Black wire from the dryer wire harness on one side of the terminal block ,and the opposite side of the terminal block should be RED .
The center terminal should be White .
So with the cord in place and ready to hook to the terminal black put the Red cord wire on the Red terminal on the terminal block
Put the Black cord wire on the Black terminal; block
The white wire from the cord to the center terminal block .and the you have the green (ground wire) from the left find a screw that is next to the terminal block that screws directly to the metal chassis and remove it and put the green cord wire on the screw.
So then you have Black to Black on one side of the terminal block .The Red to Red on the opposite side of the terminal block ,the white to the white (CENTER) terminal on the terminal block and the ground green to the metal chassis.
It should end up like this .
Now in this photo the red is a light blue but on your model Frigidaire uses Red .Black ,White wires on the terminal block .
And if you have any questions just reply back to me!