Mini Breadboard pin question

Do the rows go vertical or horizontal? I cant find a data sheet on the mini breadboard only the bigger boards.

I would use your trusty multimeter (DMM) to check this out.
Generally if there is a vertical gap for D.I.L. packages (dual in line) the rows of holes running horizontally will be connected together.
But trust your meter !

Chewie B

But trust your meter !

I agree wholeheartedly. To help you out though the vast majority of mini boards have the rows at the ends connected for power, while the inner rows are connected perpendicularly, separated by the DIP space.