I don't have a picture handy Jan, but I'll try to explain.
If you look at the handle, there is an arm at each end of the handle facing inwards which is what always breaks. To save money, Nissan only tooled one handle with two arms that can be used on either side of the car. Only the rearward arm of each handle is used on each side of the car. When you swap the two handles side to side, the forward arm becomes the rearward arm. That broken arm will no longer be needed since it will be the forward arm when mounted on the opposite side of the car. The only thing you need to do is swap the little plastic keeper over that the rod goes through. Once you or your mechanic looks at it, it will be obvious how it works.
If you still don't understand, let me know and I'll take a picture of a spare handle tonight when I get home.
EDIT: Gotta love google images. I found this...
It shows the two arms and the little plastic keepers. You broke the RH arm on your driver's side, but the LH arm is still good.
Do you understand now?