Hi all in US-glider land!

I am in the process of installing my brand new core and intend to use the Dsub9 connector for power. Can anyone confirm which color cable is connected to pin 7 (+) and pin 5 (-)?
Why do they keep that such a secret - the manual does not give a hint?
I paid good money for it and don't want to let out the magic smoke the first time I turn it on.

Thanks,

Uli