Where is the Serial Number on my Itunes Gift Card?

I was scratching my Itunes Gift Card and I accidentally scratched off a few characters of the activation code, and customer support told me to look at my card and find a serial number, but there isn’t any? There’s a really long number, about 60 digits long, above the barcode (I’ve tried that), a 6 digit number in the bottom left hand corner, and a number of about 10 digits in the bottom right hand corner. Which one of these is the serial number?

10 digits