I asked TT to send me the cable needed to use digital moded software with my O2 . they sent me a cable with din plug on one end and four rca female plugs on the other end being yellow ,red,blk,and white. my computer has no rca male plugs to match the rca female plug how do I hook up my OII to the computer so I can use rtty and other software digital comm? John kb2huk