How to power complicated motherboard

[Captain Confused]

This is my first PC build and I got an MSI Titanium XPower Gaming Z170A MOBO with an RM550x Corsair PSU.

I've noticed that there are 4 places to connect power to the motherboard, noted JPWR1 thru JPWR4.
JPWR1 is just the 24 pin main MOBO connector, which is fine and easy.
JPWR2 is the 12V 8-pin CPU power connector, also easy mode hooked up good to go.
JPWR3 and 4 have me confused. JPWR3 appears to be a 4-pin 12V CPU power slot, but IDK why it would be necessary as the MOBO boots up without it connected. JPWR4 is a 6-pin slot that looks like a SATA/Peripheral connector, I have no idea what earthly purpose it could serve.

My questions are these:
1. Can I power JPWR3 and JPWR4 with the extra SATA/Peripheral slots I have on my modular PSU?
2. Do I even need to power these?
3. If I did power these with peripheral slots, how would I convert from the 6-pin slot on my PSU to the 4-pin slot on my MOBO?

Thanks for any replies

 

[kanewolf]

This particular board is odd. The owner's manual doesn't give any guidance. JPWR4 is to provide extra power for PCIe slots. JPWR2 and JPWR4 provide power for the CPU and maybe provide extra power for the USB3 ports. Since this motherboard is marketed as an "extreme" overclocking motherboard, they may include the extra power to the CPU socket to provide more stable voltage for overclocking. That motherboard is targeted for WAY more than a 550W power supply.