Actually add the component in question

Content.Server/Explosion/Components/TimerStartOnSignalComponent.cs

@@ -0,0 +1,15 @@
+using Content.Shared.DeviceLinking;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+namespace Content.Server.Explosion.Components
+{
+    /// <summary>
+    /// Sends a trigger when signal is received.
+    /// </summary>
+    [RegisterComponent]
+    public sealed partial class TimerStartOnSignalComponent : Component
+    {
+        [DataField("port", customTypeSerializer: typeof(PrototypeIdSerializer<SinkPortPrototype>))]
+        public string Port = "Timer";
+    }
+}