As far as I know, there is no ready-made horizontal parallel connection. But do you think it's okay to separate directly like this? Like I painted in the picture? Pay attention to the thickness of the wire diameter. The front wire should be thick, and the rear wire can be thin, but it is best to be as thick as the incoming wire, so that the screw will not be biased. Suggestions for reference. thank you

One more thing: if possible, the incoming wires should be connected to the 3 rd and 4 th pile heads and branched to both sides, so that the current can be evenly distributed.