Adding AdWords conversion tracking to GTM with a cross-domain setup
I've got Google Tag Manager setup on my website (website.com) and that's using Universal Analytics. I've got cross-domain tracking setup within GTM, as I have a checkout URL on a 2nd domain (checkout.com).
Currently the AdWords conversion tracking code exists on the confirmation page of checkout.com, but I was looking at implementing this via GTM. Is this possible, because the GTM container doesn't exist on checkout.com, only website.com? I have the Analytics script installed on all pages of checkout.com, and the AdWords conversion tracking code (on the checkout confirmation page).
I know there's an option to add the AdWords conversion tag within GTM, but I'm wondering if this will work if GTM scripts aren't on the checkout domain...
Thanks for any help!