Addressing Scheme of openPLC in node-red

I am trying to write a value 1 to location %Qx0.0 using a modbus-write node to openPLC running in RPI. and read the Location %QX0.1 using modbus-read node . can someone please help me with the Address i need to fill while configuring the nodes.

Thanks in Advance.

with warm regards.

I have Attached the screen shots of the node configurations.

Do you know what address you would use if you were accessing OpenPLC from something other than node-RED? If not then you need someone who knows about OpenPLC rather than someone who knows about node-RED, in which case this may not be the best place to ask.

Thanks for the help