From the pic above
The top line , 24 pin atx goes to the big 24 pin slot atcthe front of the board below the ram.
It will only fit one way & will lock down once pushed in.
The 4 pin EPs CPU cable goes into the 4 pin socket above & to the left of the CPU socket.
On the vs550 this will be on a cable with another 4 pin plug , these can be slotted together for when a board requires 8 pin power.
Yours is 4 pin only , only one of those cables will fit & it will only fit in one orientation .
Unless you are stupidly heavy handed you can't plug the wrong one in or the wrong way around.