1993 Chevy S-10 Multi-point fuel injection

Engine Mechanical problem
1993 Chevy S-10 6 cyl Four Wheel Drive Automatic

On a 1993 chevy S-10 4.3L engine with multi-point fuel injection, can the injectors go in any cylinder? Or does each injector have to go to a certain cylinder?
I was told that it doesn't matter which cylinder the injectors go in because the injectors are all activated at the same time. When fuel is delivered to one cylinder it is delivered to all the other cylinders at the same time.
If they have to go certain individual cylinders, can you tell me how to tell which cylinder they each go to?
Thank You.