We're going to put the Language Reference through some serious stress testing here. We're going to arm ourselves with every synonym for "mouse" we can think of. Here's a list that I painstakingly brainstormed: mouse, screen position, cursor, pointer, input device, small rodent, two-button, aim, point. One of those has to do the trick. And, if we come up empty-handed, we're going to hit those online tutorials hard until we find our answer.
Go ahead, fire up the Unity Language Reference and type mouse into the Search field. Scour the resulting list. We will not back down. We will not take "no" for an… oh, hello, what's this?
Midway down the list, there's this entry:
The current mouse position in ...