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If you add a guidescope to your main scope, you have to align it. Otherwise what is the point of having the guidescope in the first place. Same with your finder. Take your time to make sure that what you see in both reflects what you can view through your main scope, making sure that what's centred there is in the crosshairs of your finder and centred in your guidescope. Otherwise polar aligning your main scope to take piccies or whatever will be a waste of time.
Do an approximate alignment of your guidescope and finder with your main scope on some terrestrial object at some distance to you....say a light pole a few hundred yards away. Then later on, at night, adjust your alignment using a bright star.
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