Question Did I short circuit the motherboard or PSU?


Jul 21, 2017
My friend has been trying to get RGB fans for his case and he got them today from amazon with Molex connectors, ever since he got them, I tried to help him install them
His PC was off during that time but the power cable was still plugged in if I recall
To be honest I do not much knowledge with molex connections in fans
I was not sure where exactly I told him to plug it in but it did not turn on the first attempt which I knew it was incorrectly plugged in , and after we gave up in like 3 attempts, we unplugged the fans and plugged everything back in and it won't turn on at this point
Which makes me believe I have potentially short-circuited his PC,
from my knowledge right now, If i researched right, i was supposed to connect one of the cables to the motherboard but it was connected into the power supply which probably created the short circuit
So did I short-circuit his power supply or motherboard?

Motherboard: Gigabyte B365M DS3H Micro ATX LGA 1151
RAM: G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-3200 CL16 Memory
GPU: MSI Radeon RX 570 8GB Armor OC
PSU: Corsair CXM 550W 80+ Bronze Certified Semi-modular ATX Power Supply
Case: Cooler Master Masterbox Q300L Micro ATX Mini Tower Case
Tried to install fans: