The slots for connecting the Power LED+, H.D.D LED, and other front panel connectors are located on the JFP1 connector on the motherboard. This connector controls power, reset and the case's LEDs. On this connector, you'll find the pins for Power LED+, Power LED-, HDD LED+, HDD LED-, Power Switch, and Reset Switch. These pins are clearly indicated on the motherboard and in the installation manual to make it easier to connect the case cables correctly.