add links specific to integration doc instuctions (#4789)

Author: tcgilbert

src/partners/index.md

@@ -69,11 +69,14 @@ Follow the steps to build your [source](/docs/partners/sources) or [destination]
 
 Documentation is integral to enabling Segment's users to self-serve and onboard with your integration. Segment's documentation team will work with you during this part of the process to ensure your documentation matches the Segment style and is as instructive as possible.
 
+- [Source Documentation Instructions](/docs/partners/sources/#write-your-sources-documentation)
+- [Destination Documentation Instructions](/docs/partners/destinations/#write-documentation)
 
 
 ### Submit your integration for review
 
 Before users can go hands on with your integration, a review by Segment engineers is required to ensure the integration meets security and usability standards.
+
 #### Destinations
 
 To submit your destination for review, follow the destination-specific instructions [here](/docs/partners/destinations#submit-a-pull-request).