"if you are talking about the mini apm pro (that is not a Pix since the pix is 32 bits and this is 8 bits) then you have to connect on the output side (Ports on right side picture on the page 5) as follow:
top left side is the OSD/ Telemetry (if you…"

"@Nischal
I'm using the PM module to power the board and another single ubec (5A) to power the outputs, servos in my case as I'm using the board in an airplane (Bix3)"

"Hello all, I just wanted to add some more info on the subject.
Trying to set up the board yesterday for an airplane (w/ arduplane) I realized that the board, when powered by the PM is NOT powering the outputs servos. I had to add power to the output…"