how to connect satelite to another satelite (not to main router)? AX3000

[ductin1993]

I just bought 3 new AX3000 mesh wifi, i place it in 3 floor
FLoor 1 : main router
Floor 2,3 : nodes
but my AX3000 in floor 3 connect to floor 1 not floor 2 make my wifi in floor 3 so slow.

 

[x7razor1911]

I also want to know if there is a solution.