Sorry, not the affidavit, but the bail hearing:
"Botha said the holster for the 9 mm pistol was found under the left side of the bed, the side on which Steenkamp slept. He also implied it would have been impossible for Pistorius to get the gun without checking to see if Steenkamp was there. Roux later argued that Pistorius had suffered an injury to his right shoulder and wore a "medical patch" the night of the killing which forced him to sleep on the left side of the bed."
http://bigstory.ap.org/article/pistorius-arrives-2nd-day-bail-hearing
You write "inconceivable". Not really. OP has brought in the fans, closed the curtains and all that, and is now blind as a bat because it's pitch black. Suddenly he hears a sound from the bathroom. He's semi-crazed with terror <modsnip>. Next thought from our hero: Get the gun! He goes around to other side of the bed, without checking the bed for Reeva; he's not in his right mind. The reptilian part of his brain is in control: GET. GUN. NOW. Not inconceivable at all.
Blind as a bat in the pitch dark, so how exactly was he planning to plug in those fans in this pitch dark?.