Even if somebody had their own Beko oven to look at and advise you or a circuit schematic handy it would be taking a risk to tell you where to put the wires - your oven might not match theirs or the circuit diagram.
Your presumption that the Yellow/Green is an Earth wire is likely spot on - it would be criminal to use such a colour combination for anything other than Earth but the normal practice is to have Earth conductors more permanently fixed with a nut, screw and locking washer.
As for the Blue wire can't comment - perhaps if you could make a continuity check (with the power cables disconnected of course) between the incoming terminals and the two spade connectors in doubt - then you would know for certain.
A cheap multimeter will often have a continuity buzzer built into it (£7 Maplin) and might save you the cost of a specialist call out and an electric shock.
Good luck... Take care...
Peccavi, September 2009
