The busboard is not a complicated build, but there is one thing that must be considered to ensure that everything is correct.
Make sure to rotate the power connectors so that the notched side lines up with the notch printed on the PCB. As long as you do that, your busboard will fit fine, without any problems. If you rotate the connectors, this will cause serious problems when you plug in your modules later.
This picture shows the correct placement of the connector. All of them line up the same way.
p0k3t0 