Find the week or module you want to add the reading list to and under Existing Activities, click External Learning Tools

Search for Library

Click the PWL – Library Reading List link and it will be added to your module.
Click the PWL – Library Reading List link you just created to open the Library Reading List

Click the three dots next to the section you want to link

And click Re-link from Desire2Learn to here

Click OK on the popup

You will see a notification indicating that your change was successful

You can then go back into your module and test it out! You can relink the reading list as many times for as many different weeks/modules as you would like by following the steps above.