Batboard

I have acquired 6 R1225 UHF radios that I want to use as link radios.

I did not get a control head with them, anyone have a part number for the control head or
is there a method to program these without a control head or can I use a GM300 control head just for programming?

anyone have a pinout of a programming cable for use without a control head?

Thanks in advance
Steve

GM300 control head works fine for programming, you just won't have any button functions.