XavierCalderon93

Hey guys! I was reading through everything and I had a question about the connection to the board needed. According to the pictures posted of the physical board, there is a 1-3 and a ground. According to the diagram posted earlier, there are 4 connections( 2 pos, 2 neg) but no ground. So my question is, does there need to be a ground and if I plan on doing 26650s can I just solder to each POS part of the cradle?