the seat belt adjuster thing is probably off track i hardly ever reattach them, i like the belt lower anyway it's got nothing to do with the srs light, without a reset tool you can try unhooking the battery to see if it'll clear that way as it's a soft code from unhooking the seatbelt latch with the key on, if that doesn't clear it you need to get it reset or maybe drive up to the inspection station when it's empty and leave it running, maybe they won't notice
all america wants is cold beer warm cat and a place to take a poop with a door on it