The psu is missing some cables, and i really need the sata power, i dont have any other cables for it. (Only gpu power, 24pin and cpu-8pin.)Why do you need to do that? Bad cable, some mismatch with existing cables?
Could be an indication that something else is wrong or already misinstalled.
Raw answer - no.
You should not exchange/swap modular cables between PSUs.
Use the cables that came with the new PSU.
There was a time when such things could be done. Not any more.
Readings FYI:
https://voltcave.com/modular-power-supply/
https://forums.anandtech.com/thread...nd-mixing-cables-or-fire-in-the-hold.2572341/