doc: Improve laird-sentrius LBS configuration guide

Author: i3mSuperMan

doc/content/gateways/laird-sentrius/cups-certificate-configuration.png

@@ -17,8 +17,34 @@ Choose **Semtech Basic Station** as the **Mode**.
 
 {{< figure src="../basic-station.png" alt="Create new server" class="plain" >}}
 
-Follow the instructions for [Connecting LNS]({{< ref "/gateways/lora-basics-station/lns" >}}).
+## CUPS
 
-If using CUPS, follow the instructions for [Connecting CUPS]({{< ref "/gateways/lora-basics-station/cups" >}}).
+To connect the gateway via CUPS protocol, follow the instructions for [Connecting CUPS]({{< ref "/gateways/lora-basics-station/cups" >}}).
+
+Fill the **CUPS Server** in the **Server Configuration** with the [CUPS Server Address]({{< ref "/gateways/lora-basics-station/cups#cups-server-address" >}}).
+
+{{< figure src="../cups-server-configuration.png" alt="Create new server" class="plain" >}}
+
+Click on the **Choose File** button to upload the **Server Certificate File** and **key File** with the [CUPS Server Certificate]({{< ref "/gateways/lora-basics-station/cups#cups-server-certificate--cups-trust" >}}) and [CUPS Key File]({{< ref "/gateways/lora-basics-station/cups#cups-key-file" >}}) respectively.
+
+{{< figure src="../cups-certificate-configuration.png" alt="Create new server" class="plain" >}}
+
+Click on the **Upload Certificates** button.
+
+Click **Update**. If your configuration was successful, your gateway will connect to {{% tts %}} after a couple of seconds.
+
+## LNS
+
+To connect the gateway via LNS protocol, follow the instructions for [Connecting LNS]({{< ref "/gateways/lora-basics-station/lns" >}}).
+
+Fill the **LNS Server** in the **Server Configuration** with the [LNS Server Address]({{< ref "/gateways/lora-basics-station/lns#lns-server-address" >}}).
+
+{{< figure src="../lns-server-configuration.png" alt="Create new server" class="plain" >}}
+
+Click on the **Choose File** button to upload the **Server Certificate File** and **key File** with the [LNS Server Certificate]({{< ref "/gateways/lora-basics-station/lns#lns-server-certificate--lns-trust" >}}) and [LNS Key File]({{< ref "/gateways/lora-basics-station/lns#lns-key-file" >}}) respectively.
+
+{{< figure src="../lns-certificate-configuration.png" alt="Create new server" class="plain" >}}
+
+Click on the **Upload Certificates** button.
 
 Click **Update**. If your configuration was successful, your gateway will connect to {{% tts %}} after a couple of seconds.