Hey mate, I've got this exact case. Basically at the back you should see 2 3 pin connectors and 2 4 pin connectors. The 4 pin connectors are for power, and the 3 pin connector, connect your fans to.
Basically the power goes through the 4 pin, up to the fan controller, down the 3 pin and to the fan. I'm not sure if thats the front io connector you have there, but basically you can connect and disconnect the front cables easily to take off the front panel without damaging the cables.
Any more help with the case, message me