On my desktop PC, the plug to the power button + lights is actually split into its component parts, and each component is labelled. So I can connect to each pin

On my desktop PC, the plug to the power button + lights is actually split into its component parts, and each component is labelled. So I can connect to each pin on the motherboard header separately. This made it easy to yank the power and HDD activity lights, while keeping the power and reset buttons enabled.