Neff hob wiring

[KevinLChamberlain]

The electrician won't wire the Neff hob until installed. The installer says the hob needs wiring before installing.
The wiring diagram gives a range off options but does not specify which of the various connecting points should be used.
After months of waiting why should I worry about having something to cook on?

 

[MarkBarl]

Would the electrician wire the hob end but not connect it to the supply untill installed?

 

[KevinLChamberlain]

The hob needs fixing in and is not easily accessible from underneath where the neff wiring box is.