I want to use the +5 VSB of a Seasonic PSU for powering a Raspberry PI 3. The PSU can deliver up to 3 A. I plan to grab it from the PSU side by crimping a split adapter for the 10-pin plug.
The PSU is the PRIME FANLESS PX-450, wired as follows:
In my case, +5 VSB will be pin 9 (10P-9). However, I don't know which ground would be the best to use. There are three grounds available (pin 1, 2, 3) but I want to use the ground which is already used for +5 VSB to not overload something.
Is there anything other important for me to be aware of?