Could Orbi RBK43's satellite connect each other with Lan Cable

Dear all, please help

I'm setting up with the Orbi RBK43 system in a environment that three-floor house with rooftop, i would like to ask that anyone have the experience connect the Orbi system from 3rd floor to rooftop or could the Orbi Satellite connect with each other with lan cable ? Because i tried to connect the Satellite (WIFI) from 3rd floor to rooftop, but the rooftop's Satellite only have extremly low speed, thanks