I built a sim cord for my Futaba T6XH using a old "AT" computer keyboard cord, If you hold the plug with the ground notch on the bottom, break out the 3 pins on the left, and 1 pin on the far right, the only pin left will be the 4th pin,
Used an Ohm meter to check what wires I needed, and tested it out, It wasn't necessary for "me" to jump out the 2 other sockets,
now I'm learning how not to crash my new heli, for only 1.50$
I also got the parallel connector from the old AT mother board,
I hope this can help some one out,,