Prefab not instatiating with correct values

I have created and enemyAi and also an Player which moves to mouse and camera follows. Now, I have finally finish up my script and ready to instantiate the enemy all over the map.

Now the enemyAi have a look(), chase(), attack() function, however when I instatiate my enemy, its ment to look for Players transform.position but all it does is travel to the origin/center of the map and do nothing. even when my player is right infront of it.

Now, this is how I am able to get it working again, while the game is in play mode, I simply drag and drop the "Player" which is on screen into the Enemy Game object field (Players transform.position) and then it found me on the map and started to chase and attack.

What I would like to know, How do I save a prefab with all my required settings and information then instantiate it onto the map without it requring me to drag and drop the items onto it again just so that its updated with the correct "Players.transform.position".

Im not sure if im explaining my self very well, because im new to unity and im not sure how to explain this. The image below shows my prefab, within the EnemyAi Script, you should see Player which requires the players transform position.

once the prefab is instatiate, it would appear as if the players transform is out of date and it requires an update and I cant drag and drob on each and every enemy I instantiate.

Please Help, if you can :) Thank you very much.

UPDATE: I was able to fix the issue via script. I place this code at the start of my script and it worked. Player = GameObject.Find("Player").transform;

Now, that works find for me, however my Ai look(), chase(), but it dosnt attack(); So I rekon I need to add somthing just like what I just did, but i dont know what.

Again without instantiateing the enemy, everything works fine. but after it instantiate, its giving problem.