That was a good suggestion. I did. Here's what I asked:
Q: My question is what amp terminal is connected to which sub terminal? Should I use the same connector on the amp for the subs, as the mains? Which means that the same connections shown in the pic below for the mains, are repeated for the subs and connected to the sub's speaker level inputs R/L?
A: Yes, that is how I would wire up the subwoofer.
Given the ease of splitting out from the amp, the SVS solution, the one that I offered them, seems messy and unnecessary. Is that a reasonable conclusion? Of these 3 options, the splitter seems cleanest.