Hey I have a sone questions regarding the Anycubic Kossel Pulley I bought off of amazon

1. what do these wires do? http://imgur.com/MMcs8Ys

2. Where do I plug the heated bed wires into on the power supply? http://imgur.com/dbebFoe

See the anycubic Google drive for information on connecting the bed

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Here is a picture

Not directly related to the OP issue, but something that I wanted to ask for a long time.

Using this PCB, can you implement a second extruder? I am interested in upgreading to dual extruder.

As far as I can tell, there is posibility using this PCB as there is room for 1 extra heater, 3 extra temperature sensors and also 1 extra motor driver.

Anyone that has experience, please share, maybe others are interested also.