On 2.2 you’d bridge the 3.3 and the gnd with a 47-100 uF 6.3-10V ceramic capacitor (603 or 805), wire power from the 3.3 and put the gnd on a blade pin - in the below case i used pin 6. For 3.9 proffie you can just use the 805 pads on the board as shown here (thanks to prof for this image):
blade config:
SimpleBladePtr<CH3LED, NoLED, NoLED, NoLED, bladePowerPin6, -1, -1, -1>(),
and because it’s a blade, you’ve got to give it a style. give it something like this:
StylePtr<Blue>(),
so it stays on when the board is active. when inactive it’ll switch off via the mosfet like all the blades do. much better on power.