Yes, that was the wording then, it was the qualification to vote (male, citizen, over 21). Since the adoption of the 19th Amendment (which happened after, and supercedes this text) that standard has included women and today you just need to be a citizen and over 18. The proportionality of loss of EC votes and congressional seating (these are apportioned on the same basis, after all) was about states like South Carolina and Mississippi, whose population of enslaved people exceeded that of white citizens- if these states didn't respect the new citizenship and voting rights of most of their citizens, they'd lose more than half of their federal representation, and that in turn would cost them and their confederates influence in the resulting federal government.
My prior comment, made in the context of a Kansas court declaring that voting is not a right according to the Kansas constitution, was intended to point out that if nobody has that right in Kansas, that may be well and fine in Kansas politics, but if Kansas conducts itself in that way it will cost them influence federally, and that sets the stage for another round of Voting Rights Acts that can be used to guarantee voting rights federally even if states don't want to do it themselves.
It's pretty okay. Lots of engagement, also there's something of a 'block early and often' culture that seems to have a way of really reducing the drama and nonsense