connection

Hello,
I’m drawing my current system which is :

192.168.88.1 to 254
^
| Bridge Mode
ISP—>RB450—>AP’s------->recievers.

now I want to give a point to point connection to a place and set another mikrotik routerboard to that place so that it will be like that

ISP—>RB450—>UBNT NANOBRIDGE M5(AP)---->UBNT NANOBRIDGE M5(STATION)---->RB450(RB450-2)—>AP’s


So how can I do this connection settings in my rb450-2 what is my ip going to be and what are my dns’s going to be to go to the internet with rb450-2 and how am I going to give a static IP address to my rb-450-2 as how my ISP gives to me to acces there global ??

can anyone answer me ?

pleasee