hi, sure they'll be same principle as all shimano's.
use thumb to shift back gearing and look through from the levers.
you should see a clear hole through the shifter.
if not its casue the cable is still in.
push the cable from adjuster back through, and you will see the barrell end poking where the levers are.
pull out and re-insert new cable.
now connect to mech and the easy bit, set gears.
hope that helps, sounds clear as mud now i've re-read it.
i'm no journalist, just proved it ha ha !!
rides: '84 Raleigh Corsa - '87 Raleigh 653 Race - '87 Raleigh Track 501 - '93 Orange P7 - '95 Marin Nail Trail - '98 Rock Lobster Team Ti - '99 Kona Jake the Snake - '00 Kona Stab Dee-lux - '07 Yeti 575 - '10 Yeti ARC - '02 On One Inbred SS - '15 Trek Farley 6
Unicycles - Kris Holm 19" & 24", Torker LX 20"