You're right. The power socket would be the one at the opposite end. There is no close shot of it but pict 11 above and
http://www.jiongtang.com/blog/wp-con...2009/06/13.jpg show it.
As for the sticker, if it block the opening of the device and can't be peeled off and replaced after without damage, you are probably voiding your warranty by removing it.
If so you should keep contacting both Eletroworld and smartdevices and wait to see what they proposes to you.