does anyone have a diagram of Mitutoyo linear scale model AT112 using a 9 pins round plug?

I need to match it to a KS series DRO that uses a 15 pin RS232 type connector

It is very difficult to find àny information on these connectors: it would be a great great help if I would know the +5V Vss and the color of the Ground wires because the other two signals can be determined using an osciloscope

The connector has the following colors:

red
orange
yellow
blue
green
brown

Normally the +5V is red and the grnd black but there is only a brown colored wire

again any help is greatly appriciated

thanks!