Got my PSU power cable mixed up with my monitor power cable.
One is a 10A fuse and the other a 5A fuse, they are both similar thickness.
My guess would be the 10A goes in the PSU but would it matter?
5A x 240V = 1200W.
10A x 240V = 2400W.
Put the 10A in the PSU.
EDIT : Although 240V is AC, it is peak 240V or RMS?