Adding cubes to secondary

[Civilian]

Doing a Bourbon Barrell Stout that just finished up fermentation for my 5th brew.

Instructions say put the cubes into a secondary, but I was wondering if it would be better to put the cubes into the primary through the stopper for the airlock. My thinking is this would add less oxygen as I will be transferring to a bottling bucket to bottle eventually after aging as long as I can stand.

Thanks in advance!

 

[VikeMan]

The disadvantage with doing this in primary is that the beer will remain on the trub. That said, it could be fine, assuming that the beer won't be there for a lot longer.