I extended the wires on my 8S so they would reach using solder, shrink wrap to cover the joint and slightly larger AWG wire. I do not know the length of the wires that's supposed to come with the 16S BMS.
I'm sry, but I didn't see a photo like that at their site. Can you post the picture or a link to it?
If you're talking about the one in the User Manual, that's just an graphic illustration, not a photo.
Like gazoo said, you may need to alter the wires for your specific application.