No slack in the cable and engages right in the sweet spot. I just hate to mess it up,
New plates and discs are not perfectly flat from the factory and will "bed" themselves quickly. Just like a set of brake pads, they will fully seat themselves early on. That is why HD recommends you perform the adjust at 1K.
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On my 2009, I was surprised how close I was to the limit of the pressure screw adjustment window after just 1000 miles. But that was my bike, and with an adjustment like that, no two are the same.
Don't go by slack in the cable or clutch lever position because as the clutch pack wears in and beds, the slack gets reduced.
If you feel you might "mess it up",,,, sooner or later your going to have to face the challenge. You may as well do it now, learn all about it and get it over with. I would.