To redirect the pages of your knowledge base you need to copy its permalink.
Once, you have the permalink of the page you want to redirect, then follow the steps below:
Step 1: In the Settings page, Go To Configure & Brand.
Step 2: Under the Table of Contents tab, scroll down to '301 Re-Direct' and select Manage.
Step 3: Now, click on +Restrict New URL.
Step 4. Add the permalink (in this example, it is create-a-new-tooltip) you want to redirect in the left box. Then, choose the permalink of the page where you want the redirection to be done.