Yes and no. The halyards could end up on the "wrong" side of the thru-bolts. But I am not sure it would make a lot of difference. You would want the front two halyards to go down the mast in front of the bolts and the aft two halyards behind the bolts. If they went on the other side there might be some additional friction but probably not serious, maybe not even noticeable.
You could ensure they went on the right side by facing the mast front downward while installing the forward halyards. Then install the bolts and turn the mast over with the back facing down. Now install the aft most halyards. I assume your Kenyon mast has four like mine, two in front for jib and spinnaker and two aft for main and spare. I use the spare to control my topping lift.