I Have a set of SIK V2 telemetry radios with pixhawk v1 cables (4wires) , can these radios be used with the cube , if so how do the cable need to be changed or can the be purchased is USA
Yes but you will have to cut and solder the cables. I think you have to search for https://www.google.com/search?client=firefox-b-d&q=JST+GH+4pin from Cube black side.