Found it. There is a rod running from top of MMM connector back to a plate attached to the rear arms. It has a turnbuckle. Turned the turnbuckle to the right and raised the left side. Now it's back where it belongs.
NOW. There's the question of length of travel on the elevation lever compared to deck height. The deck completely moves to ground when lever is on 9. I'd like more control over the deck travel. The rear arms start moving when the lever is at 5. Seems there is another setting I need to adjust. It's not the one in front of the seat, that controls speed of lift but not length of travel of deck/arms compared to lever. Any ideas?