I am using your SC835TQ-R800B chassis with a non-Super Micro motherboard. The front panel LED's and switch connections between the motherboard and the chassis front panel do not match. Do you have different front panel cable, perhaps one that simply breaks out to all the individual connections?
Yes, contact RMA department to order the 16 pin split cable for the front panel LED and switch. The part number is CBL-0084L.