documented upgrade process? (no replies)

Hello,

I currently have isntalled version 7.2.5 of the cluster and want to upgrade to 7.2.6.

what I cam unable to find is documentation on how to go about doing this.
I know there is doc about mysql serverupgrade:
http://dev.mysql.com/doc/refman/5.5/en/upgrading.html

But coudn't find anything specific to cluster besides the posibility of upgrades:
http://dev.mysql.com/doc/refman/5.5/en/mysql-cluster-upgrade-downgrade.html

Do you first upgrade from data node to management node? vice versa?
Is there an mysql upgrade script required?

Do you simply just overwrite the binaries? in bin leaving data intact?

Thanks for the advice and the proper RTFM link if I misssed it.