Nitrous plumbing A1A...??..

Head is spinning again..lol...
I wonder how many ways I can manipulate the timing with the MSD...
I have the six Al with the built-in adjustable rev limiter and a two step as well. If I'm not mistaken the two-step works but interrupting the white wire for the tachometer which is also hooked to it.. I wonder if this also hooks to the white wire or to the distributor or to the coil?...
And if it's something I can hook in a series with the nitrous switch or is it something I have to adjust without being able to bring in on a trigger..?
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