My mistake.

Turns out I had the correct adapter for my Hitec Flash 5x all along. The confusion was over the number of pins on the plug. The supplied cable with AFPD has 5 pins and the Hitec socket has 6 holes. The orientation of the socket holes looked different from the plug pins but don't let that confuse you. The cable fits just fine and apparently only uses 5 of the 6 holes in the DIN plug.

I still prefer my customer service over the phone but I got the correct answers to my problem within 24 hours on this forum. And afterall there wasn't a problem with the product, just the user.