FOR DN1 Appliance (M4)
NETWORK ADAPTER #1 10_Gbit port [enp10s0] - Cluster Port (Intra Cluster Link) (recommended)
NETWORK ADAPTER #2 1_Gbit port [enp1s0f0] - Management (recommended)
NETWORK ADAPTER #3 1_Gbit port [enp1s0f1] - Cloud Update Connectivity (recommended)
NETWORK ADAPTER #4 10_Gbit port [enp9s0] - Enterprise Network (recommended)
As you can see the enp10s0 recommended personality is the Cluster port which has the Intra Cluster Link designation in the configuration wizard. The Network Adapter identified as the Cluster "Link" needs to be connected and status of UP. As noted these are only recommended personality assignments and you can identify the personalities for your needed and configured Network adapters.
Using the 1Gbit ports for the Enterprise, Cluster personalities can be done but not recommended for a production deployment. This is typically seen in labs in POCs. Also, even though you do not plan on expanding your single node cluster to 3 nodes, you should always configure the first node like you will.
Also, just another important note: Once the Network Adapter is identified as the "Cluster link" you can not make changes to the Network Adapter IP configuration without rebuilding again. So IP Address Planning and configuration of the Network Adapter Personalities at the initial install is important so one should always plan accordingly.