Bach Partita 6 BWV 830 Toccata piano fingering

I would play f# and e with my left hand - then the trill is easy (alto voice third and fourth beat) 

Same for me. F# in left hand. RH thumb holds B. Trill with 4-3. 

Same for me with the same fingering. Isn’t it great that we all figured it out with the same result! 

I still play the trill with 4-5 myself to connect to the next octave of E smoothly. However, with the help of damper pedal to get rid of 1 on RH as soon as it hit F#. The trill starts with a longer note, which sounds stylistically correct.