T-Motor pro 55 II ESC question about 10a BEC

Okay so I need this dumbed down for me. I have purchased a T-Motor 55a pro II esc and the new CL 7 Racing ver 2 flight controller. [https://oscarliang.com/clracing-f7-v2-fc-mpu-dual-gyro/] This is the link with the wiring guide from Oscar Liang.

what is it you need?

Help in connecting the 4in1 to the FC ?

Yes and what to do with the 10v bec?

The 10v BEC can be used to power your FC, Rx, VTX, FPV camera.
Its another power output.