In their book "Von Glückzahl bis Geheimzahl" Christian Hesse and Karsten Schwanke write:
As far as the absoluteness of space is concerned, Kant gave the so-called argument from the first piece of creation for this. He fictitiously assumes that the very first thing in an otherwise completely empty world is a single human hand created by God. This single human hand must inevitably have been either a right or a left hand. It was not possible to leave it completely undetermined in terms of the division left or right. For if that were the case, and if God subsequently created a handless body, it would have to fit on both sides of the body. "Which is obviously impossible", as Kant concluded.
Here, however, Kant committed a mistake in thinking which he himself later noticed and which caused him to depart from absolute space. By letting God create an actionless body, the situation is fundamentally changed and the problem eliminated. For then one can define the first created hand in relation to this body as a right or a left hand.
To be honest I cannot understand this line of thought. Could anybody explain the argument and to which part of Kant's work it is referring?