no-sku issue

Hi Tomi, first thanks for your great plugin, I’ve implemented and set up it in WP + Woocommerce , and works fine.

So, I have a question for you, Where you say into macro ElementID or ElementSKU, into value there is a no-sku value, How to personalize this value with real sky variable?
For example, in GA for prestashop website, I’ve got SKU, size and colors in same line.

Other thing, for to view the funnel, all steps when user add into cart until last page where converted, doesn’t work, I saw other post similar by @cr8tiff, and I don’t understand if set up in GTM or in goals directly.

Thanks
Marco

https://wordpress.org/plugins/duracelltomi-google-tag-manager/