Surge protecting Omnitik 5 PoE

Greetings!
I’ve got question about surge protecting MikroTik hardware. I’ve got 16 meters height metal stand that will get Omnitik 5 PoE at the bottom of it . It will be powered by PoE adapter into 1st port, 2nd port will be connected to wAP LTE Kit that will be powered by PoE from Omnitik 5 , 3rd port will be connected to hAP ac Lite that also will be powered by PoE from Omnitik 5.
OmniTik 5 will be Point-to-Multipoint for LAN with another remote place (about 600 meters) that have LGH 5 in it.
The main question : do i need to install RBGESP on both sides from DC plug to Omnitik only or i need to install it on 2nd and 3rd ports from Omnitik + on sides where wAP LTE and hAP ac Lite will be installed (total 6 RBGESP)?
Scheme will be like this:
Untitled Diagram (1).png
Appreciate any kind of advice.

If multiple devices are used it is recommended to use one RBGESP on each end…
https://mikrotik.com/product/rbgesp#fndtn-downloads