The returns elevator feeds a short auger that moves the returns to the centre of the accelerator rolls if the bottom plate has not been removed (in an N6) I believe I have read somewhere on this site that in later models it could be adjusted out of the way much easier. If the plate is removed, the returns feed straight down into the top of the feeder housing. However, the 2 augers immediately above the accelerator rolls tend to move material to the centre of the rolls anyway. Perhaps there may be a fan flow restriction to the right side of the chaffer_sieve for some reason. Hope my meanderings help.