Hi everyone. I just joined the forum. I'd done some research here before purchasing, and decided to go with the Go Go. I just got it today. As I'm a newbie to vaping, I have what might seem a silly question, but I couldn't find it answered anywhere. I got the fillable carts and juice, and I just filled my first one. Now the question...is there a mouthpiece that is supposed to go on the "fillable" end of the cart?? I can't imagine just using it as it comes, but no mouthpiece came with the kit. Any help is GREATLY appreciated!