This can be done with the -xref command and follow the prompts to write the code.

(The command "-xref" * * * * * omits the add-on-demand condition here)

(command "-xref" "a" (getfiled") Select the file to be referenced ""DWG "0)' (00)"1"1""0")

"A" stands for attachment.

(0 0) The insertion position in the diagram can be (getpoint "Specify the insertion point position:").

Program according to the prompt

I hope this helps.