EmonTH with multiple sensors

Hallo dear, hope you can help me,  i read everything on the net but there is something i am making mistake, cause -first- i am not able to connect the EMONTH on the IDE , i have an usb2uart with 5 pins, and emonth has 6 ....

second-  i am not sure i understood the firmwre update way, and which type of programmer set in the ide envirolent ...

 

can someone help me starting with tell me which 5 pins of the six i have to connect ?

 

regards , Paolo