Active Campaign Zap issue: Missing "Contact ID" for tagging in WooCommerce order

Hi everyone,

I am new to Zapier and i hope you can help me:

I want to create a ZAP, where a customer buys a product on my website.
Then this customer should get a TAG in Active Campaign, that the product is bought.
 

1. Order WooCommerce
   2. Only continue if...line items contain product ID
   3. Add Tag to contact in AC
   
   Number 3 is not working cos of the missing contact ID in the Action Step of AC.
   
   But i don´t know any contact ID.
   What ID do i have to put in there?
   Does anybody know by any chance?
   
   Thanx a lot, Stephanie