How can I disable Paypal's Pay in 4 option on my website?

Hello everyone.

I need your help on a topic that’s not really common.

We have Paypal enable on our website and we want to disable the Pay in 4 option (not the button, the option that shows when the paypal window opens) because it’s not optimized for France yet.

We managed to find some answers here : https://www.paypal-community.com/t5/Products-Services/Cancel-Pay-in-4-keep-Paypal-as-a-payment-method/td-p/2884038

And the code to add to the theme here : https://developer.paypal.com/sdk/js/configuration/#link-configureandcustomizeyourintegration

The code being : <script src=https://www.paypal.com/sdk/js?client-id=YOUR_CLIENT_ID&disable-funding=credit,paylater>

Problem is : we don’t know where to put the line of code.

Can you enlighten us on where to put the code or if you have any other recommendation?

Thanks