Possibly the navigator sets the north/south and east/west wind components on the knobs. For example, if wind is 25 knots from 30 degrees, it's equivalent to 22 knots from the north plus 12 knots from the east. Therefore, turn the left knob clockwise (toward the side marked N) to 22, and the left knob counterclockwise to 12. The old analog ASB-9A system formerly in the B-52H similarly divided wind into N/S and E/W components, though the display was on counters like a mechanical odometer. Also, wind determination was normally automatic via the doppler radar, though manual input was available as a backup.
The picture shows so little of the Ground Position Indicator system, I'm just guessing.