How to Modify a java Script variable with a c# Script

i want to add 10 seconds in a timer when I kill an enemy. This is the countdown java Script:

 var Timer = 60;
 var Bonus = 0;
 function Start(){
 yield WaitForSeconds(Timer + Bonus);
 Application.LoadLevel("inicio");
 }

and this is the C# enemies Script

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class DamageManager : MonoBehaviour
{

	public GameObject[] deadbody;
	public AudioClip[] hitsound;
	public int hp = 100;
	public int Score = 10;
	
	private Vector3 velositydamage;
	private float distancedamage;
	
	void Start(){
		
	}
	
	void Update(){
		if (hp <= 0) {
			Dead (Random.Range (0, deadbody.Length));
		}
	}
	
	public void ApplyDamage (int damage, Vector3 velosity, float distance)
	{
		if (hp <= 0) {
			return;
		}
		distancedamage = distance;
		hp -= damage;
		velositydamage = velosity;
	}
	
	public void ApplyDamage (int damage, Vector3 velosity, float distance, int suffix)
	{
		if (hp <= 0) {
			return;
		}
		distancedamage = distance;
		hp -= damage;
		velositydamage = velosity;
		if (hp <= 0) {
			Dead (suffix);
		}
		
	}
	
	public void AfterDead (int suffix)
	{
		int scoreplus = Score;
		
		if(suffix == 2){
			scoreplus = Score * 5;	
		}
			
		ScoreManager score = (ScoreManager)GameObject.FindObjectOfType (typeof(ScoreManager));	
		if(score){
			score.AddScore (scoreplus, distancedamage);
		}
	}
	
	
	// ** Important! for Ragdoll replacement
	private AS_RagdollReplace ragdollReplace;
	
	public void Dead (int suffix)
	{

		if (deadbody.Length > 0 && suffix >= 0 && suffix < deadbody.Length) {
			// this Object has removed by Dead and replaced with Ragdoll. the ObjectLookAt will null and ActionCamera will stop following and looking.
			// so we have to update ObjectLookAt to this Ragdoll replacement. then ActionCamera to continue fucusing on it.
			GameObject deadReplace = (GameObject)Instantiate (deadbody [suffix], this.transform.position, this.transform.rotation);

			ragdollReplace = deadReplace.GetComponent<AS_RagdollReplace> ();
			// copy all of transforms to dead object replaced
			CopyTransformsRecurse (this.transform, deadReplace);
			// destroy dead object replaced after 5 sec
			Destroy (deadReplace, 5);
			// destry this game object.
			Destroy (this.gameObject,1);
			this.gameObject.SetActive(false);
		
		}
		AfterDead (suffix);
	}
	
	// Copy all transforms to Ragdoll object
	public void CopyTransformsRecurse (Transform src, GameObject dst)
	{
		
	
		dst.transform.position = src.position;
		dst.transform.rotation = src.rotation;

		
		foreach (Transform child in dst.transform) {
			var curSrc = src.Find (child.name);
			if (curSrc) {
				CopyTransformsRecurse (curSrc, child.gameObject);
			}
		}
	}

}

How can I connect the Scripts

it is not advised to cross languages like this, if it does not cause errors now, it will during compiling into an actual application. i would convert the java file to a c# if i were you.