If there is no connections on the film, it will not be easy. Perhaps it is a factory reject, promotional sample or unfinished product. There is two conductive layers, one top and one bottom that need to be fed with AC.
If nothing is attached, and as last resource, lightly scraping could gain access to somehow apply conductive epoxy. Try to not do it one above the other, but using different opposite areas on the LEC.
edited, added ---> **broken link removed**
Be careful, it is not low voltage what you will be playing with.