If you can get your data matrix (size=[68 x Ntime]) as a variable in the Matlab workspace, you can create a folder anywhere in your Brainstorm database, right-click on it > File > Import data matrix > select the corresponding variable and then enter its sampling frequency.
It will create a new files with your data in the database. This file can already be sent to all the processes in the Connectivity menu.
If you want to add labels to the various signals: right-click on the new “matrix” file > File > Export to Matlab, replace the Description field with an cell array of strings with the exat same dimensions. THen right-click again on the file > File > Import from Matlab > Select the variable name that you exported.
There are many other ways to proceed but the would involve some Matlab scripting. We only have interface menus to import recordings (MEG,EEG,…)