If it works as ure saying then its great, and a very "must have" modification. + its cheap too.
The doubt arose to me, that may be the wiring isnt proper and maybe it needs a ECU commands to work to.
But as you said, its just a matter of some screws and wires.. and ure gud to go. So its realy great
IF i ever get a Alto, im getting this done the very next day.