add ref

Author: norareidy

source/connection/connect.txt

@@ -60,11 +60,8 @@ figure explains each part of a sample connection URI:
    :alt: An example of a connection string that demonstrates the protocol, credentials, hostname or IP, port, and connection options
 
 In this example, you connect to an Atlas MongoDB deployment that has a
-DNS SRV record. For more details, see the :manual:`DNS Seed List
-Connection Format
-</reference/connection-string/#dns-seed-list-connection-format>`
-documentation. This format offers flexibility in deployment and the
-ability to change the servers in rotation without reconfiguring clients.
+DNS SRV record. For more details, see the :ref:`connection-uri-srv`
+section of this guide.
 
 .. note::
 
@@ -94,6 +91,8 @@ In the example, you set two connection options: ``maxPoolSize=20`` and
 ``w=majority``. For more information about connection options, skip to the
 :ref:`connection-options` section of this guide.
 
+.. _connection-uri-srv:
+
 DNS Service Discovery
 ~~~~~~~~~~~~~~~~~~~~~