LRB20 Satellite setup

I have two Orbi LRB20 routers. Is there a way to make one of these Orbi's a satellite node to the other LRB20? So I can extend the WiFi coverage in my house? The signal on the far side is a bit weak and I'd like to repurpose the LRB20. I can't connect them via ethernet due to cement form walls, landlord doesn't want holes drilled in order to route the cable. 

thanks

-shane