If you are at a darkish site and align the scope using a compass and clinometer with some reasonable accuracy, you should be able to see the four alignment stars of octans through polar scope. You will notice that the 'octans' in the polar scope may be oriented differently to your view. Simply rotate the RA axis of your mount (the one that moves the counter weight) until they are the same orientation then make your fine adjustments to alignment.
As soon as you are under a clear sky, it will fall into place
BTW, with 30 second exposures you may be ok with only a rough alignment.