If they are anything like the international spot turns, the 'spot' part of the term may be initially misleading.
What you do is step through on the inside legs on 2 (like a new yorker if you know that). Then on the and you both pivot in place, keeping your weight on that foot and turning through being back to back. On 3 you replace your weight on the other foot and pivot to face each other. Then do a 4&1 chasse facing each other.
Key points are that it's change weight on a "number" and pivot on the "and", keeping your weight on that foot you just stepped on. Thus there are the same number of weight changes on the same beats 2,3,4&1 as in a basic.
It's called the spot turn because the second step on the 3 is really a replace action - you shift your weight back onto the foot which has stayed in the same position the whole time. This is very slightly different from the lady's alemana underarm turn in international, where she will take a small step forward onto that foot.
I said nothing about left or right as you can do the spot turn in either direciton, and it's symmertical betwen the partners.