Found two programs here called setmouse v1 and v1.1 here
http://www.amiga-stuff.com/pd/cam.html
from Club Amiga of Montreal. Search page for setmouse.
found two of their cd sets here..
https://archive.org/details/CAMCD
Not sure if both files are on these CD's
Version 1.1
SetMouse_v1.1
SetMouse V1.1 will move the mouse pointer to any position and
optionally "select" the left mouse button which can trigger gadgets all
from the CLI or a script file. SetMouse can enhance Arrex scripts with
it's ability to select gadgets. AmigaDOS V2.0 compatible. Usage:
SetMouse [x] [y] [wait]