There is limited information available on the internet regarding this product, so questions.
Is the appliance purely electrical or is it gas fueled too?
I ask this, as it could be the flex could be offering power for ignition only.
If it is an electrical appliance, do you have the manufacturers instruction and does that inform you on how it should be supplied?
If not do you know the output power rating of this appliance?
This should be found on a plate at the back of the appliance.
Is the plug top a moulded plastic one, (where the fuse can be removed without opening the plug up and the plug top can not be removed via screws) or is it one you can buy off the shelf somewhere and connect yourself?
What colour is the flex/cable coming from the oven to the plug top?
This information will help.
The top plug is a moulded one