I am trying to install an SSD (Kingstom A400) into my pc but the power cable won't fit into the SSD (https://imgur.com/a/gCGC6rU).
What type of power cable will fit the SSD?
you should have one directly from the PSU. The thin ones are data and go to the motherboard. The wider one is for power.
Your picture is a combined one for some reason, and it is a bit hard for me to tell but it doesn't really look like a sata cable.
should look something like this:
There is another sata both are together, It is called slimline sata. I have a SFF PC had to buy an adapter to connect a new slim DVD to it, but it was cheap cable to get.
SATA power. Directly from the PSU.