[Test-Equipment] Fluke 1920A counter - info needed

[k4pf at juno.com]

Hi, Gang

Anyone have an old Fluke 1920A counter?
I picked one up on eBay (no manual), and it arrived
with a connector adrift internally.

Can anyone tell me how the cable goes from the left of the front
panel (viewed from above)?  There are two empty sockets,
and the connector is unkeyed, so can be put into either 
socket backwards or forwards. 

I found a free operating manual on line, but not a service manual.
I don't want to spring for a service manual unless the counter
shows some signs of life. 

73,
Ed Knobloch