Maaaaaate.... Monaro back seats are for makin kids not carrying them!!! Seriously though.. I cant advise as me got none. Maybe another coupe owner will admit to knowin how it's done??
Depends on how old the child is. We have two diffrent car seats a Britax isofix set - crap fit Also a Maxi Cosi RodiXP - no problem - but child has to be at least 15kg