Lenovo MT 1871 Hardware Maintenance Manual page 90

Removing and replacing a FRU
If the wireless antenna jacks have tabs marked "MAIN" or
"AUX", unplug the jacks by pulling the tabs with your
fingers. If the antenna jacks do not have the tabs, unplug
the jacks by using the removal tool antenna RF connector
(P/N: 08K7159) or pick the connectors with your fingers
and gently unplug it in direction of the arrow 3 .
3
4
3
86
R50/R50p, R51 Series