To create a signup page:
In Planning Center People, go to “Forms” and create the desired form (copy from others as needed).
When finished, click “View on Church Center”. When the page opens, copy the URL, e.g. https://cedarhome.churchcenter.com/people/forms/1095566
In Squarespace, create a blank page in the “Not Linked” section. Assign a suitable name for the link, e.g. christmasbrunch.
Click the gear icon for the new page, and select “Advanced”.
Under ‘Page Header Code Injection”, insert: <meta http-equiv="refresh" content="0; URL=https://cedarhome.churchcenter.com/people/forms/1095566" />
Now, when the link is selected, e.g. www.cedarhome.org/christmasbrunch, it will auto-forward to the churchcenter.com page containing the form.