I don't understand why the OP has 4 black and 2 yellow, there's no benefit to running additional wires on only one side of the supply.
One of the first round auction winners had an 'issue' when spreading inputs across the two terminals, see http://www.youtube.com/watch?v=cvAFBWHGw58. No no no no no! Look at the video, he had two separate 12V inputs, two single grounds in both of the -ve ports. His solution was to double up the cables using one port only. In fact this has no electrical impact if the board is behaving as it should be. In my setup I have double grounds on BOTH ports, effectively reducing the cable load on the neutrals by 50% from his 'fixed' configuration.
In my configuration the wires are room temperature.
so i should try first with 1 black and 1 yellow ?
Look what you've started with YOUR misinformation, a user now understanding that they should use as few cables as possible, an extremely dangerous proposition.