Well, you can always check it by tugging on the wires to see if they come out. Don't tug hard, I mean you can break anything if you try hard enough. I mean a reasonable little tug. If they fly right outta there, then you have one of the defective connectors and you need to contact support. If they don't come out from hand-tugging, then they won't come out when they're installed behind your dash and you don't need to worry about it.

The other option is to solder the connectors yourself. I actually have a movie file from David of doing precisely this, but I'm working out kinks in getting all the movie files posted at riocar.org at the moment.