Set up google analytics goal and check snippet config

For Google analytics specialists only!! Small job, 90 minutes max, must be available right NOW. I need to set up my google analytics correctly to track sales as a goal so you'll have to check if my snippet config is set up correctly and then create a goal that allows me to see my Ecommerce conversions on another domain (that I can see already in analytics) but that are only available in the Ecommerce tab, not in the Goals tab. In other words, my aim is to create an experiment to track the best converting pages on my site with Ecommerce sales on another site as a Goal. If you understand what I need, please type " I can link external Ecommerce sales to your goals!" in your message. Thanks