How Do I Access Animation On Another Game Object

I'm trying to access an animation on another game object C# script when Serial data is received from the Arduino with two button inputs.

Problem I'm having is that I'm trying to call the animation from this part of a script called "Sending"

 void DirectionArrow(int Direction)
     {
         if (Direction == 1) {
             //Trigger Left Arrow Animation on "SystemGuidanceManagerScript"
 
         }
         if (Direction == 2) {
             //Trigger Right Arrow Animation on "SystemGuidanceManagerScript"
 
         }
     }

But the animation on my "SystemGuidanceManagerScript" are If Statements in Update like this:

 void Update ()
     {
         //Up Arrow North
         if (Input.GetKeyDown (KeyCode.UpArrow)) {
             animTopIndLED.enabled = true;
             IndicatorsFX.enabled = true;
             Top_LED_Indicator.SetActive(true);
             animW.enabled = false;
             animE.enabled = false;
             animNarrow.enabled = true;
             animSarrow.enabled = false;
             animWarrow.enabled = false;
             animEarrow.enabled = false;
             GetComponent<Animator> ();
             animN.enabled = true;
             animN.Play ("GuidanceBarGraph_N_ani");
             GetComponent<AudioSource>().PlayOneShot(BarGraphInFX, volume);
             animNarrow.Play ("GuidanceInidicatorsN_ani");
             animS.Play ("GuidanceBarGraph_SOff_ani");
             ledSarrow.SetActive(false);
             ledWarrow.SetActive(false);
             ledEarrow.SetActive(false);
             ledNarrow.SetActive(true);
 
             ledLightsE.SetActive(false);
             ledLightsW.SetActive(false);
 
             ledLightsN.SetActive(true);
         }
         //Up Arrow North Off
         if (Input.GetKeyUp (KeyCode.UpArrow)) {
             animN.Play ("GuidanceBarGraph_NOff_ani");
             GetComponent<AudioSource>().PlayOneShot(BarGraphOutFX, volume);
             ledNarrow.SetActive(false);
             IndicatorsFX.enabled = false;
             animTopIndLED.enabled = false;
             Top_LED_Indicator.SetActive(false);
         }

How can I access them? I keep getting "Cannot access because of protection level nonsense.