How to connect these defrost hoses

Caberocks said
Thanks, I may just get some cheapo duct hose at Home depot and do it. I think the original hoses were different sizes on each end. Wonder what the Chrysler engineers were smoking? LoL!

Now I feel stupid. You can buy 2.5 inch duct hose at Autozone 72 inches long for 10 bucks. Oh well, live and learn buying stuff from "restoration shops". Hopefully this post will help the next guy.
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The larger size port on the heater case goes to the drivers side dash vent so this side get lions share of air. The other 3 connection ports are the same size. When the aftermarket supplies all single sized tubing they'll supply a bushing for that 1 larger port, defeating "what the engineers were smoking".