Dumb question #1. GPZ750

Ok. My head is down and i'm embarrased to ask this question.
How do I open the seat on my 82 GPZ750.
Looks like a combined helmet lock and seat release mechanism on the left of the seat directly above the rear axle.
this bike hasn't been ridden in 20 years and the previous owner's home made rack interfers with the key action but I'm thinking this key action should release the seat lock and it will hinge up.
How do I open the seat on my 82 GPZ750.
Looks like a combined helmet lock and seat release mechanism on the left of the seat directly above the rear axle.
this bike hasn't been ridden in 20 years and the previous owner's home made rack interfers with the key action but I'm thinking this key action should release the seat lock and it will hinge up.