This is a modification I forgot to mention. There are 2 photocells on these mirrors, one in the front, another on the rear. The mirror compares the amount of light from both photocells to determine when to dim the display, and when to dim the mirror. Since the photocell is soldered to the circuit board it moved further inside the housing. I used a plastic tube to kinda funnel light to the cell. I’m wondering if I should have moved the sensor forward to sit in the same location as it originally.