How to fit Creda W100FW Door Catch?

Creda W100FW Door Catch
Was attempting to fit new door hinge and unscrewed the 2 screws without securing the back plate, disaster when it fell to the bottom of the machine, tried to remove front panel to retrieve so unscrewed the two screws on right hand side of door.

Have since retrieved back plate and fitted new hinge but now i can't refit the door catch, do the screws on the door catch also screw into a back plate as i has flipped the machine on each side looking for another plate and can't find one? does it exist or should i be looking for somethings else?