OBSDOCS-3341: Fix spanmetrics procedure

Author: max-cx

modules/otel-connectors-span-metrics-connector.adoc

@@ -29,3 +29,31 @@ The following is an OpenTelemetry Collector custom resource with an enabled Span
 where:
 
 `metrics_flush_interval`:: Defines the flush interval of the generated metrics. Defaults to `15s`.
+
+The Span Metrics Connector creates metrics with the following labels:
+
+[options="header"]
+[cols="a, a, a"]
+|===
+|Label |Description |Values
+
+|`service_name`
+|Service name set by the `otel_service_name` environment variable.
+|`frontend`
+
+|`span_name`
+| Name of the operation.
+|
+* `/`
+* `/customer`
+
+|`span_kind`
+|Identifies the server, client, messaging, or internal operation.
+|
+* `SPAN_KIND_SERVER`
+* `SPAN_KIND_CLIENT`
+* `SPAN_KIND_PRODUCER`
+* `SPAN_KIND_CONSUMER`
+* `SPAN_KIND_INTERNAL`
+
+|===