UPDATE.
thanks for the link, bug. it did help. i watched it and the guy showed the case sans guts. a thing i never noticed ... BOTH sides of the case open up. who knew?
i opened the right side and saw where the lead from the old dead fan went. followed it to it's connection. disconnected and tossed it.
i also discover FOUR fan leads there and discovered that there is an intake fan in the front lower part of the case (it's not obvious from the outside). i connected two of the four to the two new fans. there is a fan speed switch on the top of the case and now it controls my two new fans.
again, thanks everyone <3
AMD Ryzen 5 5600X CPU. 16GB DDR4-3200MHz RGB RAM. 1TB M.2 NVMe SSD. GeForce RTX 3060 Ti 8GB GPU. Windows 10. ViewSonic & Samsung monitors.