I would take look at the ipl's for both saws.? And try to compare the parts
The front handle would need to be donated ( as you won’t get the wire away easily from the sleeve), the flywheel has a magneto in side which you won’t get off . So the fly wheel would need to be swapped the magneto pick-up coil should fit ? . the rear handle is just a butterfly sticky thing that maybe able to peel off. the rest is just wiring and there is the on off switch. Which all the saws i know/seen have the markings where it would go if it was fitted
I’ve edited this about 10ish mins after posting.
I think there maybe typos/ autocorrect in the op. Hopefully the op can confirm and even better post pics of both saws.