hi, i need confirmation about identification of elements selecton on photo, i think that first element from the right is connect to 125leg of KBC and there is C507 or C506 which is capacitor 1000P_0402_50V7K, and second from the right is connect to 124leg of KBC and there is R507 which is resistor 0_0402_5% and third element is empty, that correct ?

yes, important resistor 0om, capacitors secondary, unimportant.