Keysight N9010B EXA Signal Analyzer Service Guide 503
Assembly Replacement Procedures
Reference Assembly
5. For instruments with Option B40, MPB, or DP2 refer to Figure 15-53. 
Remove cables W5, W6, W14, W19, W20, W42, and W50 from the 
reference assembly (1). Use the 5/16 inch wrench where necessary.
Figure 15-53  Reference Board Cables - with Option B40, MPB, or DP2