Identify the top and bottom of the red circuit
board. The top side has solder features and
red ink; the bottom is blank and translucent.
[Bulbdial Assembly Guide]
Place the red circuit board over the
LEDs. Its bottom (blank) side should
rest against the leads of the LEDs.
Without flipping the assembly over, feed a
screw up through one of the corner holes.
Add the other hex standoffs the same way.
Once you have two on board, the LEDs
should be protected against falling out.
Hold the screw in place while you thread
on one of the short M/F hex standoffs.
Do not tighten it yet.
[23]
STEP 18: Add the red retaining ring
TOP
BOTTOM
Line up the four corner holes of
the red board to the matching
holes on the main board.