Please, try the following.
In the dwg file, menu Manage > Insert > Insert Object.
In the Insert Object dialog, select the option “Create from File”, Browse to the file, open it and then click OK in the Insert Object dialog.
Position the file in the desired location in the drawing.
I hope this can be helpful.
If not, please, provide more details about what you want to do.
Thanks and regards,
Product Support Technical Lead
MFG - Inventor