Add links to other related collections on any of your collection pages with Pipeline:
Pipeline uses Shopify's Navigation menu system to bring-in custom menu items into any collection page and displays them as subcollections with a graphical image, collection name and link
Using the Theme Editor, navigate to collection where you'd like to add subcollection links.
Enable the option to Show subcollections:
Next, use the link to create a navigation list, the rest is done right in the Shopify Navigation editor.
Create a new menu with same name as your collection:
Add your menu items, these will be the sub collection links:
For best results, add a collection image to each of your subcollection collections:
Subcollections require Pipeline 5.2