adding 2nd STng converter in system

I'm adding an older VHF radio with DSC function to the network. The terminators at the end of the backbone run are inaccessible. (wire runs are full and won't take another cable) That's why I need another converter, placed in the cabinet near first one. Now am connecting new converter to the existing converter . . . all sockets are used, no terminators at the converter. Have already connected wiring from the radio to the new STng converter.
Can you please tell me if this attached wiring diagram is correct?

Thank you,
Gary B.

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