HP 1660CS-Series User Manual page 126

Probing
The Termination Adapter
The logic analyzer must be properly terminated to operate correctly.
Most HP preprocessor interfaces have properly terminated state
connectors; however, many of them require termination adapters for
the timing connectors.
The optional termination adapter allows you to connect the logic
analyzer probe cables directly to test ports on your target system
without the probes.
The termination adapter is designed to connect to a 20-position
(2x10), 4-wall, low-profile, header connector which is a 3M-Series
3592 or equivalent.
Termination adapter
7-7