Sorry I'm not part of the deal, anyway are the manual seats pre-facelift or post and is the coupe the same otherwise issue with occupancy sensor in passenger seat.
Very simple to fit, seat bolted down by 4 x 16mm bolts, undo them first on both seats. Them disconnect battery and leave for 30 mins if electric. Then unplug loom under seats. Swap seats and plug loom back in. Bolt seat down job done.
My airbag lift came on but that my fault as I hadn't connected passenger loom when I connected battery up. Hoping to clear it tomorrow with DIS v57 software.