Chassis fans don’t spin

Jun 3, 2018
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I’m using a CoolerMaster Masterbox mb500 Which has 3 fans connected to a single cable (3-1 splitter) and then I plug it into one of the chas_fan slots in the ASUS HERO VIII motherboard but they don’t power on and aren’t detected by the motherboard in BIOS

What’s wrong?
 
Jun 3, 2018
14
0
10


The fans individually don't seem to want to fit into the chas_fan connector
 
Jun 3, 2018
14
0
10


well I connected it individually, but nope the fan still doesn't spin