Well today was going great until I found out that my receiver battery which is a: (Protek Life Hump Receiver battery pack 2s 6.6v/1700mah) does not plug into my charger.

I figured I just needed a simple adapter but when I went to my LHS he tried selling me a completely different charger because of this.

I have a Hyperion EOSO 720i which is awesome but can someone please tell me where to find a connecter for the Protek life battery pack I have to be able to fit the barrel plugs on the charger? I believe the one I have is the female version and perhaps I need the male? or maybe just the opposite?...I need to learn about the birds and the bees with this topic,lol.

I have one adapter but I am guessing it is a male and maybe need a female version? I checked the Internet and can't find anything which has me exhausted.
Here are some pictures that may help...the 1st picture shows my problem...the 2nd picture shows the adapter I already have which is not the correct one. Thanks in advance....Once again I am sure there has got to be an adapter out there somewhere.