RFD PPM radio use

Hi im just setting up my RFD,ive got the 868xTX Mod on my Horus and the *^*x on my quad,am I right in thinking that all I need to do to get the ppm radio working,eg cable from pin 15 to rc in on cube,and I presume tick the rc in and out on the gui many thanks

Thank you so much Matt,will have a go at setting it up tomorrow.