Secondary Mirror Center Mark

Hello, after acquiring all of the components for my son's 10" newt, we're starting to assemble the ota. I know why there's a center mark on the primary mirror. But is there a need to center mark the secondary mirror. Maybe to collimate this mirror with the focuser? In the grand scheme of things, is a good idea, would it matter?

Thanks Don & Galen 8)
Amateur telescope builders, we may break things, but hey, we're learning

There is no need for a center mark on the secondary. The secondary will be set up using visual reference provided by the sight-tube or other tool. Even looking down the empty focuser can get it very close.