Cookie Auto Confirm all 3 option preferences

[Dexen14]

Hello, can you help me please by triggerin that 3 options with marketing, analytics and functions to be auto checked when somebody press accept for cookie? 

I did a code with chatgpt but i dont know if it is correct and I dont know where should i put it

document.addEventListener('DOMContentLoaded', function () {
    const observer = new MutationObserver(function (mutations, me) {
        const bannerDialog = document.querySelector('.shopify-pc__banner__dialog');
        if (bannerDialog) {
            const cookiePreferences = bannerDialog.querySelectorAll('input[type="checkbox"]');
            cookiePreferences.forEach(function (checkbox) {
                if (!checkbox.checked) {
                    checkbox.click();
                }
            });

            const acceptButton = bannerDialog.querySelector('button.shopify-pc__banner__btn-accept');
            if (acceptButton) {
                acceptButton.click();
            }
            me.disconnect();
        }
    });

    observer.observe(document, {
        childList: true,
        subtree: true
    });
});

[Dexen14]

hey