Here are the locations of the flat head allen screws to remove all the gauges at the same time

When pulling the bulb holder out of the back of the gauge, it takes a 1/3 of a turn to get them out of the gauge

When replacing with a LED bulb it will only light up if it is put in the correct way, if it does not light up when installed, turn 180 degrees and put the bulb holder back in and it should light up.

The RPM gauge on my year model does not require a turn to remove the bulb holder, it was more like a lot of pressure straight out to remove the rubber wire grommet that incases the bulb holder.