For the LAB599 TX-500 radio, 5 pin to 3.5mm 3 conductor (TRS, stereo) female AND a 3.5mm male plug with 3 foot molded cable for your key, paddle or bug.
The adapter is 12 inches, the key paddle cable is 36 inches

For a paddle red is DASH (Tip), white is DOT  (Ring), Shield is ground 
For a straight key or bug, use RED and Shield (white is not used for straight key or bug)