So i know vn-vr is different and easy to work out, don't have a VS here so i don't know what the adjuster looks like.
Now i have an early VT that is being ratted for parts and slowly disappearing and it still has the cable intact, hopefully VS is like this.
Locking "plate" in the locked position (now the tab has push stamped into it, i assume this means push to lock it in place after adjustment, but they forgot to put pull on there or it means push in the right direction.....)
Now the tricky part (front part pushed up), until it looks like the below blurry pics (it'll probably put up a fight and feel like it's gonna break so do it carefully and slowly), this is the locking plate in the in the unlocked position and the outer sheath closest to the tb moves in/out to adjust
Now I'd suggest following the gregory's manual for the correct procedure to adjust it, I know from experience on VN/VP cruise controls that if it's adjusted to tight when you resume to a set speed they tend to floor it and take off (if you resume a couple of km's under what they're set @ they will go over the set speed then drop back....... if it's in the correct position it should take up and accelrate slowly to the set speed and stop)