Open DEC digital equipment door without the key?

[9000 VAX]

I am curious about what is in the HSC70 but the the door is locked and
the key is lost. There should be a PDP11 and several HD's inside, at
far as I know.

I think people on the list might know how to open the door without a
key or force. The lock is not the round cylinder type found on a vax
4000.

Thanks.

vax, 9000