Connect 3 antenna with one as relay

There’s my network

office1 + wirelsse antenna — antenna — wirelsse antenna + office2

I have place an antenna in the middle because i cannot do the distance from office1 to office2.

Normally with juste two antenna, it’s pretty easy to setup communication. I put one as bridge and the other one as “station bridge”.

But which confiuration should i use with 3 antenna, thank

I’m using metal 2shpn router