how to set up Yamaha MG06YEM Analog Mixer to pc

Aug 21, 2018
ive been having a bit of a problem setting this up for my son this is what i got

Yamaha MG06YEM mixer
Audio-Technica 20 Series AT2035
Behringer UCA222 USB Audio Interface
2 of 2 x RCA/Phono Plugs to 2 X RCA/Phono Plugs
XLR to XLR Plug Microphone Cable
6.35mm (1/4") Male to 3.5mm (1/8") Female Headphone Jack Adapter

after getting the mixer delivered i noticed that it did not have the inputs for the rca cables for audio interface just need a little help asto what cables i need to get it to connect to the pc for live game steaming ,youtube and twitch for my son any help is greatly appreciated thanks