What is the best way to combine 2 network segments on keenetic routers?

Question

Computer networks

The task is as follows: there are 2 keenetic routers with 4g whistles with the Internet. 2 cabinets with users. Each cabinet is connected to its own router. And everyone gets the Internet from their router, and it should remain so. What is the best way to combine them into one local network?
Thank you!

Answer 1

Connect two routers with a cable, set up a separate network segment through which only routers will communicate, add routes to keenetic.
Keenetic
Network-segments