You can buy a centronics 14 pin female connector to connect to previous equipment
adsi p/n 40188005 price $6.23 + shipping and handling.
2nd source digikey norcomp inc. 111-014-203L001
3rd source NEW 14 Pin Centronics Female Cable Mount Connector 57-60140 – MarVac Electronics
4th source ebay.com 265292080193
This is pin out of the 700 connector. https://allendatagraph.com/techsupport/recorder/700manual.pdf page 5
Horizontal is pin 9 red to pin 10 black to ain3 using xy-109. If you use time base you do not need this.
Vertical is pin 2 red to pin 3 black to ain0 using xy-109
if you use the pen lift 7 red to 14 black, this will connect to the fio0-3 on the compucorder