Concatenate two separate recordings for clustering purposes

[rlab01]

Hi all,

I have two separate recording sessions corresponding to two different behavioral tasks, and I am interested in following a unit's response across the two tasks.

I think the best way to do this would be to concatenate the .spikes files from the two sessions together so that I can spike sort at once (*I use MATLAB and MClust).
Is there an easy way to do this?
I am new to openephys and am not very familiar with the structure of the files. I apologize in advance if this is a very basic question.

Thank you!