Upcoming trip to energylandia

My best friend and I are travelling to Krakow and visiting energylandia in August. I’m from the UK and have a valid Nimbus accessibility card and a Merlin Ride Access Pass. How do I go about using this at energylandia? Are they valid in Poland or are there other documents or passes I need to apply for?
I’m getting a bit stressed because there’s limited information online and I want to make sure I have everything ready and in place before we travel.