Have you looked at how the SDSS are connected? There are actually 4 arms per speaker, each with bolts that attach to the bottom plate of the speaker. This bottom plate is permanently fixed to the speaker and includes threaded holes that the stock spikes go into.
If you use something like a sofa cushion with the speaker on it's side you will probably have enough clearance.
If you use something like a sofa cushion with the speaker on it's side you will probably have enough clearance.