This cable is used for adjustment of the Counter (DG-1).
It goes from the X-Verter In jack to the three pin
connector at the top of the counter unit. It is
only used during alignment of the display counter.

It looks easy enough to construct, but I need to know
where the connections are made to that three pin
connector.

I assume there are only two connections -- the shield
and the center of the cord coming from the X-Verter
jack.

I don't have a good copy of the service or users
manuals so it's difficult for me to tell.

Thanks in advance for any assistance,

Irv VE6BP