fix links

Author: mdbirnstiehl

reference/data-analysis/observability/observability-host-metrics.md

@@ -9,13 +9,15 @@ products:
 
 # Host metrics [observability-host-metrics]
 
-Learn about key host metrics displayed in the Infrastructure UI.
+Learn about key host metrics displayed in the Infrastructure UI:
 
 * [Elastic System integration host metrics](#ecs-host-metrics)
 * [OpenTelemetry host metrics](#open-telemetry-host-metrics)
 
 
-## Elastic system integration host metrics [ecs-host-metrics]
+## Elastic System integration host metrics [ecs-host-metrics]
+
+Refer to the following sections for host metrics and field calculation formulas for the Elastic System integration data:
 
 * [Hosts](#key-metrics-hosts)
 * [CPU usage](#key-metrics-cpu)
@@ -103,6 +105,8 @@ The UI and any new rules you create will use the new metric definition. However,
 
 ## OpenTelemetry host metrics [open-telemetry-host-metrics]
 
+Refer to the following sections for host metrics and field calculation formulas for OpenTelemetry data:
+
 * [Hosts](#otel-metrics-hosts)
 * [CPU usage](#otel-metrics-cpu)
 * [Memory](#otel-metrics-memory)

solutions/observability/infra-and-hosts/analyze-compare-hosts.md

@@ -167,7 +167,7 @@ Without leaving the **Hosts** page, you can view enhanced metrics relating to ea
 The host details overlay adapts according to the [selected schema](#host-schema-selector). When viewing host data collected using OpenTelemetry, you see the following differences:
 
 * Anomaly detection isn't available for OpenTelemetry hosts, so there is no **Anomalies** tab.
-* The Lens charts use the [OpenTelemetry formulas](/reference/data-analysis/observability/observability-host-metrics.md#key-metrics-opentelemetry).
+* The Lens charts use the [OpenTelemetry field calculation formulas](/reference/data-analysis/observability/observability-host-metrics.md#open-telemetry-host-metrics).
 
 ::::{tip}
 To expand the overlay and view more detail, click **Open as page** in the upper-right corner.