I uploaded a couple of images that need a model release to LO, but I can't find anywhere to upload the release. Does anyone else have a clue?

click on the image (in the upload area) - then on the right hand side column you will see a release upload/selection spot.

Probably too late for these ones then.. Oh well, new upload tomorrow   

i think you can still edit them even if they are in the cue.

nonetheless if they get reviewed without a release they will probably just push them back into the 'to edit' area.  then you can attach a release and resubmit them.