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Set another payment methode on my webflow ecommerce site throught custom code

Hi all. I am working on an ecommerce website since one couple of months now and I am having hard time fiding a way to integrate payment methode available in my contry for the checkout. It it possible to add custom code that redirect to another payment methode?
Here is the link of the Finetech I want to use on my webflow project :
Thanks for helping me out