Assuming you are using a three-cell model (like Earth actually has), then you would also have a region of low pressure around 60 degrees latitude. This is where the polar front lies, where cold air from the polar regions intersects with warmer air heading poleward. On Earth, this causes the semi-permanent Icelandic low and Aleutian low in the northern hemisphere but no such features in the southern becuase there is no land at that latitude.
On your world, this would probably mean two, maybe three semi-permanent lows in the northern hemisphere, one in the far northeast of the map over the ocean, another or maybe two in the sea in the top middle of the map. Probably two in the southern hemisphere as well, one in the far southwest and the other in the very bottom middle. These low pressure areas would of course migrate seasonally, just like the ITCZ.
Once you have the semi-permanent highs and lows in place, then you can work on the average wind flow patterns, because the wind will be affected by the highs and lows. Remember that air flows clockwise around highs and counter-clockwise around lows.
Here is a pretty good resource giving the basics: Observed average surface pressure and winds during January