Bear with me because I'm not especially well-versed on this stuff, but I'm trying to put Facebook Pixel events on different pages of my website where I'm selling physical products. I've successfully inserted Pixel events on different pages in my website and they're working fine, but I'm not able to (don't know how to) put events on the Cart, Checkout and Order Confirmation pages. Squarespace doesn't give me any access to edit or manipulate those pages at all, so how do I insert trackers on them? Is it possible?