I would assume no change in placement.
Most of this answer is assumptions, but hey, may B the guys R out 4 the holiday…
You'll not get an exact reading on each carb so it will B a lill more tedious process (but what isn't when tripppled?).
R all 3 carbs the same model? which?
Weld the bung in the down tube, screw in the wide band & check the gage. Work on 1 carb only 2 get closer to the reading sought. Don't touch the others till optimal on that 1st. Go on to the next, don't touch the others, ck reading till adjusted to optimal. Same w/ 3rd (w/o adj of other 2). Then cycle thru back to the 1st - follow process again. I'd start w/the center carb.
How does that sound?
(sorry, not an ex - sprit, but I'll try anything).
:roll: