Kind of dumb question about Duncan Momentum

How do I go about putting on these hubs?

Above is a picture of the yoyo and the hubs, yoyo on the left and hubs on the right.

The hubs are the one that came in the package, so I guess it should fit…

take off the white one, put on the black one,

That video is not relevant because Duncan uses a different method for attatching the bearing and hub stack

really? T_T…so, how does duncan do it?