The surgeons make small incisions to put the laparoscopic instruments through. Here is a picture of one surgeon’s incisions:
In the procedures I’m familiar with, there are 3 very tiny incisions made in the general area of the belly button. Through these incisions, the doctor inserts long, thin instruments to do the procedure, as well as a scope with which he can see what is going on. Over time, the incisions will practically disappear.