It's a little unclear to me... exactly what your asking....
But if you're wanting to send song data from the BR8 to the 2488 so that you can burn it to a CD - you should be able to simply connect the "L/R line outs" of the BR8 to any two inputs of the 2488 and play your finished product/song into the 2488 and record it in real time. I don't own the 2488 so it's unclear if you can simply internally route those two tracks directly to the CD burner - or whether you have to go through a formal mixdown step first - then burn that to a CD. You probably know already?
But yeah.... the connectivity should be pretty straight forward. It looks as though the 2488 will accept the line signals from the BR8.