i did this recently but didn't find any difficulties, what if you take out the generator including and backing plate and fan? 10 minute job, then you can put your hand through the shroud. should work like a charm. good luck!
Not sure I can easily do that with a doghouse shroud and all...If I get a brand new cable, I should (in theory, lol) be able to feed the cable through the hole I created in the rubber firewall seal and through the tube... finding the tube was a bit of a problem before I cut the end of the frayed cable off, as it missed the tube and went through the tin... or maybe I'll just have to pull my carbs off, unbolt the engine and pull it loose enough to feed the cable through. Oi vey.