I think you might be able to use an "Onion Skin Overlay" in Lightroom.
LIGHTROOM HAS THIS FEATURE, CALLED "IMAGE OVERLAY".
You need an "Onion Skin" overlay image created preferably as a PNG type file with transparent areas. (Without transparency the overlay must be reduced in opacity to see the image below.)
Select the Onion Skin Overlay from its system folder [Ctrl+Shift+Alt+O] or Menu>View>Loupe Overlay>Choose Layout Image. The overlay can be re-sized by dragging the box 'handles', and hold [Ctrl] to adjust opacity with the mouse 'scrubby' adjustment below the image.
With Loupe view active, and camera tethered, as the images import you will see them with the Overlay in place. Ctrl+Alt+O will toggle the overlay Visible/Hidden.
eg. An identity plate used as overlay- (these images are NOT watermarked)
This is a screen-clip of an image in the Develop module with an image Overlay of a Frame and matte-