How to connect Yagi Antenna with RFD900x

I want to fly multiple drone using RFD900x and Cube Black as Antenna tracker , How to connect Yagi Antenna with RFD900x ,
Problem 1 - RFD900x has two antenna ports , where i should connect Yagi Antenna and how
Problem 2- What are setting to make in mission planner and Cube Black to Fly Drone in Swarm

You need appropriate antenna connector for yagi antenna

The antenna on RFD900 is diversity by default. Either one will work.