The generator door under the windshield on my 2007 Tour Master had two ACE style latches -- the matching key had large wings to turn the latch when unlocking and locking. The door had a central retractable handle and the door hinged out and down to access the four 6 volt inverter/generator batteries and the generator service items such as the coolant and the oil. Not sure if your 8411 is similar...
Below is a closeup view with the door open. The second image shows the ACE-keyed latches circled in red and the flush swivel out handle in the green rectangle:
Chuck