Technically, Trodes are an evolved form of the EEG headnets. But the books do say that they can be a full net, or just a headband. So they're not getting into the placement or anything very strictly.
So I could see that working, and it wouldn't even necessarily use up Capacity on your goggles. That capacity is measuring Visual mods you can get installed. In this case, you're not talking about adding anything to the lenses, you're just using the Trode headband as the strap to hold them on your face.
The downside being that if someone yanks off your Goggles, you lose DNI at the same time. Although that is a problem with Trodes in general, which is why hacker types usually bite the bullet and get a Datajack implanted.