Difficult to explain without a picture but ...
Assuming you're tracking inbound to the holding point, but regardless of your heading compared to the hold axis.
Look at your DI; visualise a horizontal line through the centre of the DI and a vertical line from the centre downwards.
For a right-hand hold rotate the horizontal line 20 degrees anti-clockwise ("raise the right")
Locate the hold axis around the edge of the DI. If it's in the top (or largest) segment it's a direct entry. if it's in the bottom right (or middle sized segment) it's a parallel entry, and if it's in the bottom left (or smallest) segment it's an offset entry.
Using this it takes a couple of seconds to work out which entry.
I hope it's obvious what to do for a left-hand hold.
HFD