With an auto it is not a big problem but with a stick, you just screwed up the clutch engagement point.
You could cut the shield in half (top to bottom), then slot the holes to the edge so you can just loosen the tranny, pull it back a quarter of an inch or so and slide them in from each side. You might even not slot the holes but keep the shield in two pieces, back the tranny away from the motor, remove the top bolt, slide the shield in, reinsert the bolt, remove the bottom bolt, swing the shield into place and then reinsert the bottom bolt. Repeat for both sides.
On the renix, the cover consists of the top piece and the bottom piece. From what you describe, it appears that the newer engines have a one piece cover.