can some one advice me on this

1. What type of wires I need to use to mount esc/motors and batteries. Is there any specific range/capacity. ?

2. I have XT60 connectors, can I use this with 5000mah 3s batteries. ?

3. Is there any accessories that I need to buy to mount kk2.1 board. I just brought XT60 & 3.5mm gold connectors, what else I need to buy. ?

Hey Subbiya

1> I would suggest you getting the 'Breakout Cables' They work good and are designed for the same application, in this case joining the LiPo to the ESC.

2> Yes you very well can. I myself was using Deans since the start of my hobby but seeing one deans burn during a flight, i have ALL my connectors to XT60 now And yes XT60 can take around 60AMPs of current ( the original ) so no worries there.

3> Not really necessary, personally i initially flew with Kk and it was just resting on the center plate of my frame. I later used 2 layers of Masking tape for some damping but frankly didn't see any difference in the flight. Although yes you have the damping boards you can buy, which you can actually as they aren't very costly too. That is up to you

From your queries, i assume you are starting with quads and using a KK2 controller right ? Should you have any more problems gimme a holla
And contact me anywhere, FB, Mail no issues.

Power breakout cable
http://www.vibranthobbies.com/multicopters/power-plant/power-cables/xt60-to-4-x-3-5mm-bullet-multistar-esc-power-breakout-cable.html
or Power distribution board like this
http://www.vibranthobbies.com/multicopters/power-plant/power-distribuition-board/hobby-king-quadcopter-power-distribution-board.html

Yes i would recommend Vibranthobbies for the item, very trust worthy and REALLY cheap. However if you are in no hurry to get the products and can wait for about 2 weeks, I can get them for ou , at the cheapest price

@Subbiya you would need 5 Pcs of "Male to Male Servo" leads as well for the KK2.1 Board.