Please remember that there are two styles of 6-pin XLR connectors in the industry.
Switchraft-style, which Clear-Com uses and European DIN-style.
When purchasing Neutrik 6-pin XLR connectors it is important that they are the Switchcraft-style with "S" in the part number.

Clear-Com uses 6-pin XLR connectors for 2-channel partyline connection for various different purposes;

HEADSET
Pin #1 Microphone (Low)
Pin #2 Microphone (High)
Pin #3 Headphone Com
Pin #4 Ch. B Headphone (H)
Pin #5 Ch. A Headphone (H)
Pin #6 Headphone Com
This is used on AB-100, AB-120 Announce Consoles and RS-201, RS-522, RS-522TW, RS-622, RS-623 beltpacks with split-ear functionality

PARTYLINE
Pin #1 Ground - Common for all
Pin #2 Power for both Channels (+30 Vdc)
Pin #3 Partyline Channel B
Pin #4 Partyline Channel A
Pin #5 Program Audio +
Pin #6 Program Audio -
This is used on dual channel Clear-Com beltpacks such as the RS-201, RS-522, RS-602, RS-622, RS-702 beltpacks
Make sure to use separately shielded pairs for Channel A, Channel B and Program Audio input

IFB
Pin #1 Ground  - Common for all
Pin #2 Power for all Channels (+30 Vdc)
Pin #3 IFB/Talent Channel A
Pin #4 IFB/Talent Channel B
Pin #5 IFB/Talent Channel C
Pin #6 IFB/Talent Channel D
This is used on the Clear-Com IFB system between the PIC-4, PIC-4000, PIC-4704, PIC-4744 IFB Controller and the MA-4, MA-704, AX-4, AX-704 Talent Access Stations/
Make sure to use a separately shielded pair for each channel