Hmi-cab-c49

I need to build a HMI-CAB-C49 cable to establish communication with an old Total Control Quick Panel Jr (Also sold as Proface or GE).

I already have the connectors and also the RS232 to TTL converter.

I need some additional information on the interconnections, I mean the inner schematics of a good working cable (because The Proface manual is very incomplete).

Thanks in advance for the help