What is Harshad's actual plan?

As we know that Harshad is wearing a mask in front of everyone just to show everyone that he is a changed person now. So it is clearly evident that he won't directly harm fab5. Therfore he is taking help of Aryamaan. Yesterday we saw wire pieces under the bed.Generally some beds are only made of wires. Hence Harshad may do something with bed of Manik which will hurt Manik. Then he will be cut redhanded. So why will he take such huge risk? It was clearly visible that Manik will do exactly opposite if someone will ask him to do something. Then it is clearly visible that he instigated Manik to share room with him. Then why? For first time jerkshad plan is beyond understanding. Again Aryamaan is also there. Then what role will be played by him? Maybe Harshad is setting a plot where Aryamaan will pretend to save Manik to come close to fab5 specially Manik. After that he will try to fulfil evil intentions of Harshad.