yeah, accessory, not run.
key positions are noted as 1 off key removable, 2 accessory, 3 run position, 4 momentary start position.
that's how I was learned it...
the OP has not chimed back in, so he may be running it with the vacuum line disconnected, and the only bonus for him is that the steering lock is not engaged. if that's the case, he should be able to push in the pin.