How establish transparent wireless point-to-point network link for me is clear.How could I implement routing in SXT bridge so other networks will be added and client can go from one side of the link to another.

Remove the bridge on the SXT’s and then configure routing
Example is Routing on SXT’s ether1. OSPF on wlans as BackBone and ethers as areas?
No need for OSPF, static routing will work just fine