B&Q 1000 base unit for sink

[Sabrina36]

Hi,

I’m currently fitting B&Q goodhome caraway kitchen base Units.

I have a 1000 base unit which will be fitted as a straight corner and be used for a sink.
Within their instructions they say to move the top back rail down the unit and cut out the top of the back panel if fitting a sink or hob.
I’ve not had to do this before with previous kitchen units.
Can I ask if carrying out these steps is necessary and by doing so will this effect the fitting of a worktop as it will only be able to sit on the front and side panels of the unit and also will this effect the fitting of an undermount sink?

Thanks!

 

[johnny2007]

You can leave it as a full panel, drill holes to pass hot, cold and waste pipes and have the service valves inside the cabinet rather than in the void.

 

[johnny2007]

 

[Sabrina36]

Thanks for that, so there is no need to move the back rail down as well then like they show. This can just go in the top of the unit?