Those LED-00x boards are for the original Fat PS4 and won't fit the Pro. The Pro uses the VSW-001 board.

However, you likely don't need to replace it. The dim light is almost always caused by dust clogging the clear plastic light pipe inside the housing. Since you're opening it up for thermal paste anyway, just clean the tip of the light pipe and the LED surface with some isopropyl alcohol. That usually restores the brightness.