Wild Guess; (before I go read the spec).
I'm thinking that could be SEVERAL separate resistor loads, for controlling one at a time.
Such as for selection between Dim, Medium, and Bright. In that case you would likely observe a separate surface mount transistor for each resistor,...with only one of them selected at a time.
Maybe try (power off) measure the resistances; my guess would be something like:
(R1) at 500 ohm (dim)
(R2) at 330 ohm (medium)
(R3) at 100 ohm ((brightest)