You can connect pages from a different funnel to your funnel by using the "Existing Pages" feature.
1. Open the Advanced Campaign Builder
Click Campaign Settings
Select Advanced Campaign Builder
2. Add the Existing Page from Another Funnel
Click the Add [+] button
Select Existing Pages
Select the campaign where the page is from
Select the page from the campaign
3. Connect the Pages
Drag an arrow from your page to the existing page from another funnel
Open your page for editing
Click the CTA button on the page to slide out the settings
On button actions, make sure it's set to Go to the next page
Note: The existing page is NOT A COPY of the page, it is the actual page from the other funnel. If you try to open that page from your funnel, it will open that page on a new window.
4. Publish the Funnel