MSP-GANG: RS-232 D-sub 9 pin assingment

Hi Experts,

My customer wants to use RS-323 to connect MSP-GANG with PC via RS-232. Could you plesae check if below pin assignment is correct?

1. Can customer use the standard RS-232 straight cable?
2. Pin 1, 6, 7 and 9 of MSP-GANG is not assigned. Can customer keep thes unsed pins?

Regards,

Uchikoshi