Big balance connector
 

So I ordered a new reciever pack. It came with a huge balance connector that would not fit in box. I cut that big clear part off.
https://cimg1.ibsrv.net/gimg/www.rct...24e2e726ea.jpg

You can dismantle the transparent cover with a pick. There's two locking tabs on one side. But that transparent connector should not avoid to have a reliable connection to the balancing connector