All I have for you is this procedure from the service guide, there is a special bracket but it is likely that you need another semi-rigid also.
RF Input Connector
Removal
1. Remove the instrument outer case. Refer to the “Instrument Outer Case” removal procedure.
2. Remove the front frame. Refer to the “Front Frame” removal procedure.
3. Refer to Figure 4-29. Using a 5/16 inch wrench, disconnect the semi-rigid cable (1) from the attenuator/connector.
4. Using the T-10 driver, remove the 2 screws (2) that secure the input connector bracket to the deck.
5. Remove the attenuator/connector from the instrument.
6. Separate the attenuator (3) from the input connector (5) using a 5/16 inch wrench.
7. Remove the connector from the bracket (4) using a 9/16 inch wrench.
Figure 4-29 RF Input Connector
Replacement
1. Attach the new connector to the bracket. Torque to 120 inch pounds.
2. Attach the attenuator to the input connector. Torque to 10 inch pounds.
3. Replace the attenuator/connector into the instrument.
4. Using the T-10 driver, replace the 2 screws that secure the input connector bracket to the deck. Torque to 9 inch pounds.
5. Using a 5/16 inch wrench, reconnect the semi-rigid cable to the attenuator/connector. To avoid twisting the cable, hold onto it during tightening. Torque to 10 inch pounds.
6. Replace the front frame. Refer to the “Front Frame” replacement procedure.
7. Replace the instrument outer case. Refer to the “Instrument Outer Case” removal procedure.