Wiring questions

I picked up 3 dell N750P- S0 PSU's from dell poweredge 2950. Electrical wiring is not my strong point. Can someone confirm that I'm connecting this correctly. I attached pinout for psu below. I followed instructions for power switch and fan mod from this post.



Post 8
https://www.xsimulator.net/communit...-server-power-supply-for-12v.5774/#post-65089

Post 14
https://www.xsimulator.net/communit...-server-power-supply-for-12v.5774/#post-68351

I connect A1 & B6 to turn on PSU. How would I install a toggle switch to turn PSU on and off?

For the fan mod I connect b1 & b2 and then just cap off the wire?

Now I need to get power from PSU to motor driver. I'm gonna follow the wiring diagram i attached below that I got from DMax's youtube channel to connect everything.

So to get 12v I just need to connect P4 & P3 to motor driver?

Also if I want to run a 5.5v for a fan, can I run that off of the header on the Audrino?

This may be straightforward for some but I'm not well versed in electrical wiring. Trying to learn. Any help would be greatly appreciated. Thanks

I found this article about the PSU I'm using.

https://www.rcgroups.com/forums/sho...e-2950-Server-Power-Supply-Unit-How-to-set-up

So the information in that link answers most of my questions but I still need to figure out how I would wire a toggle switch in to turn the PSU on and off.