I think on my MQ the tap is somewhere between 8,500 and 9,000 turns, and the full output is 10,000. For the example though lets say it is an 8,000/2,000 split.
Full output = 10,000 turns
Tap output = 8,000 turns
Tap makeup = 2.000 turns.
When you connect the full output, you put the whole coil in to the circuit, when you take the tap you drop 2,000 turns, and if you wired in from the tap you would get 2000 turns. But you only have one coil, you can't split it, it is one piece of wire. You can't connect it into parallel, how would you do it? I think if you tried you' just get the worst hum in the world!
Bottom line is you have only one coil. You need 2 separate ones to have parallel wiring.
btw, isn't it 3 wire for a tapped MQ - I know mine is.