it has an elongated body, and the wings are 2 pairs and 2 pairs behind those, at a sufficient distance so they do not get in each other's way, unless the dragon wants them to, also not too far apart, as the draft created by the 1st pair could be reused here, the dragon has a 350Kg weight, the weight each wing has to support is around half and half, (a bit less in the 2nd pair, and would be a bit less than that in the 3rd, if you want that challenge)
P.S:not one on top of each other, there are a lot of those questions, and not like with the angel questions, as those are on a smaller body, and less weight
edit:also, if you could, please say how big would the wings need to be edit:remember the 9 limbs, not counting neck and head,
thank you for your time and have a great day