Collimate Step 1: Remove the Primary Mirror ?!?

I just bought a new laser collimater. It says to mark the center of the primary mirror, and to do this I should remove it? That seems like a step that I, as a beginner, would rather NOT do. Can I still collimate to a reasonable degree of accuracy? It looks like this step is to center the secondary mirror, right? And the instructions say I can do this step ok without marking the center of the primary. I just don't want to get that primary mirror and then sneeze...

Thanks, Mike, and all who responded.

The rest of the story...

I was asking because of my new Meade LXD-75 8" Schmidt-Newt. Once I got it all put together, I looked down into the optical tube to behold...a dot in the center of the mirror. And the manual says so, too. But I will get with someone in the local club about the mirror. I'm curious enough to learn how this thing works.

Thanks all for your input!