Side to total parlay is simply parlaying the side & total of the same game. When the line is 1/3 or more of the total, you have a mathematical advantage (so I am told, never proven it myself) by betting matching parlays. One on Fav & Over, and one on Dog & Under. One of those must lose, but the other, if it hits, pays 2.6:1, for a net gain of 1.6 units, after subtracting the 1 unit must-lose play. Of course, if both lose, you lose 2 units. With the line at over 50% of the total you should be in a huge mathematical advantage position theoretically with these two parlays.
I see a number of these games go Fav & Under though, when they don't hit. Which is my concern here...if Hou can't score, that could happen.