E92 Single Turbo vs Twin Turbo option

As I work through my LF4 swap wiring fun I noticed in HPTuners for the LF4 hpt file that it has the option for none, single turbo, and twin turbo. I assume this single is for the 2.0L turbo ATS, etc....

Does anyone at HpTuners have any knowledge of the impact of flipping this to single turbo? Does it enable only one of the MAFs and two of the O2 sensors and one of the boost control solenoids, etc..etc..??

I can't seem to find out much about this option, what it does, impacts, etc.. without just flipping the switch and see what sensors respond vs not respond...

Thanks in advance...

M