Collision looks to have occurred more or less over the threshold of 31 - "light" debris seems to be scattered between the runway end and Highway 67, but the majority is on airport property I'd think. As ehwatezedoing says, the P-63 pilot seems to have been utterly unsighted while curving in, there were two fighters preceding, probably P-51s, who appeared to be following the runway heading, ahead and to the left of the B-17.