It looks like your el sheet is only usable where the metal pins are.
If you want you can test whether the rest of the connection points are usable by using a battery and inverter and just touching the black areas with the positive and negative wires.
If you have a coin cell inverter you can test using that.
You might also want to check if the black side is peelable or removable.
I have el sheets similar to the one you have, but mine have 4 connection points but nothing else is usable as the back of it is covered with a protective layer and there are no other positive and negative points like on your el sheet.
It looks like yours maybe usable if the black covering can be removed.
The other ones I have got from ebay have had 4 connection points and many other positive and negative points which can be used as they have no protective layer on the back.
These are more floppy than the other ones I have which have the protective layer on the back.