possible to reverse L/R channels on a digital optical (TOSlink) connection?

Here's an obscure question: Is there a way to reverse the L/R channels on a digital optical (TOSlink) audio cable?

Here's why I ask. In one room I have a pair of Audioengine HD-6 self-powered speakers with an SB2 as the source. The left speaker is the 'master' with inputs, amp, DAC, etc. and the right speaker is passive. I'm liking the sound of the DAC in the Augioengines better than the SB2's, so the SB2 is connected to the left speaker via a short digital optical cable.

The electrical outlets and ethernet jack (I could run the SB2 off wifi, but I prefer wired) are much closer to the location of the right speaker. So I could do away with the power and ethernet cables running across the floor -- and improve marital harmony -- if I switched the L/R speakers. But that would mess up the imaging. I've tried it, and on a lot of tracks it is noticeable, sometimes to the point of annoyance. If I were using analog interconnects it would be as simple as swapping the L/R cables at either the speaker inputs or the SB2 outputs, but with digital...?

Is there a way to swap L/R anywhere in the LMS software, or via a plugin? Or is there such a thing as a "reverser" adapter for a TOSlink cable? Or any other solution? Thanks.