Heated bed for wanhao duplicator i3 Mini

Hello.
I've got a wanhao duplicator i3 Mini, I am having some problems with things not sticking properly to the bed so I was thinking o putting in a heated bed, problem is I dont know if it is possible, communication with wanhao have not yielded anything inteligible and googling around for someone that have installed a heated bed on their i3 mini have also come up short. I have opened the printer and looked at it seems to have some kind of four pin plug for bed addons, but since seeing is believing, I would like to know if anyone have tried this?

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