I recently bought an NZXT H510 to replace my old case. Everything was going well until i tried to plug in the front panel cable. It didn't match the pins on my motherboard. Any solutions? Motherboard: Asus Z87 Plus
^ using images 2 for reference, the bottom row are explained, the top left row will be for the LED's. FYI, the GRND is often the -ve terminal. As for your power LED, the left most pin should be the +ve terminal.
^ image used for reference, the same can be found in your motherboard manual, page 2-9.