Modding PSU Connectors

I'm doing the usual rewiring and sleeving to my PSU and have a couple of questions:

1) 90 degree SATA power connectors have 5 places for wires, which 4 do you use? I've searched around and all I can find is "Only use 4 of the 5" and "Make sure you don't use the wrong ones"

2) Whats the thickest wire you can fit into 90 degree power connectors, any ideas?

Cheers.

EDIT: In case anybody is wondering what I'm talking about, on the left is a normal 90 degree power connector and on the right is the SATA variety:

 

1)The best picture layout I could find after a few minute's of Googling would be this. I guess you would match head orientation and wire placement to get it right. Here is one that is even better, click on the pic to magnify.

2)I have no idea - sorry.

 

2) anything that fits in the gaps between the plastic.

 

if the wire is too big then trim it down and then it will fit