Micheal,
I think you are expecting this to be more complicated than it is. In the Conduit node red screen, there is a list of input, output, function etc nodes in the left panel. From the input list, grab lora. From the function list, grab function. From the output list, grab lora. Connect as follows.
lora input———–function———-lora output
Double click the function node to insert code. Deploy it with the Deploy button in the upper right. Join the Conduit from the dot and do an AT+SEND=
Leon