Just a suggestion... I used to do this when I repaired computers...
In an ideal world the design team will have organized it so that the people in the assembly shop would be unable to miswire this piece - each plug fitting into only one socket and only one way round. The cable lengths being just long enough to reach.
Try it - with the power off of course- then if it's possible to connect everything - and it should be possible - take each connector in turn and attempt to put it somewhere else - with the power off of course. Then you'll know.
Good luck...
The manufacturer will not help you on the remote possibility of you electrocuting yourself - they don't want the aggravation of the legal proceedings.
Peccavi
December 2012