The front drains are a bit more fiddly to get to as tucked away in the corners so a bit more time and care required.
Drivers side – to gain access i removed the OBD plug mounting bracket so i could get hold of the pipe with the tips off my fingers – you may need to remove the light switch for more access..
Passenger side – best to remove the glove box for access to the drain.
Important to follow instructions that come with the kit …… see https://mgzt.info/2021/03/09/mg-zt-rover-75-sunroof-drain-repair-kit
MG ZT info mods and maintenance 