Breakout box
WARNING: This page is about a different car, the 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.
Courtesy of VOLVO CARS OF NORTH AMERICA.
The breakout box (981 3190) consists of a case with 60 measurement socket terminals and a cable with a connector.
The measurement terminals are numbered from 1-60 as illustrated.