I set it to p=none because that’s what Jacqui said to do in the official forum post:
https://community.shopify.com/topic/2367825
I didn’t include anything for pct because it wasn’t included in the example that Google provided in their official help doc:
https://support.google.com/a/answer/2466563
If you follow the instructions from my initial post, then you should be good-to-go! 