Originally Posted by
underfire
given the 'keyed' bolt pattern, the unit can be either RH or LH
Correct, though the photo isn't the variant that's fitted to the 737NG/Max.
See my previous post, and this is what it looks like in situ, courtesy of Burkhard Domke:
There are no fewer than four locating pegs, plus what look like non-uniformly-spaced mounting bolts, designed to Murphy-proof the sensor against being fitted out-of-alignment, but which allow it to serve as the LH or RH sensor.