That would work. You could also make 1:1 and squirt it in each of the combs and use that. This time of year you can direct feed it to them, and they'll put it away really fast.
If you are going dry, then you might as well pour it on top - that way it will absorb moisture as well, and in the spring if it isn't gone then you can dispose of it pretty easily. And it may be easier.
There's many many ways to skin this cat. :)
Finski, it is ok to not post at all if you are afraid of some contention.... ;)
now I must answer because you give terrible adwices.
You cannot givedry sugar to cells, because bees keep them rubbish and carry most sugar out of hive.
Normal winter feedinfor winter is that youmake 2:1 sugar +water and feed it in upper box.bees take syrup into hive so quickly that the whole 20 kg sugar is taken in in two days.
That is for one langstroth box.
To feed 2 box hive give first duringtwo days so much as they take.then keep one week brake and give the rest.
To give 1:1 syrup is spending energy. No need tofeed them extra water.
To pour into hive 20 kg dry sugar? I really cannot say what I THINK about that beekeping. I will be surely banned for ever.
I cannot understand US FEEDING STYLES. On another hand you play with small glass jars and on another hand you pour sugar as dust or as crystals into hive. and winter losses are huge.