An attachment guide for an interbody cage and a spinal plate includes a guide body and a coupling element. The guide body includes a proximal end, a pair of flanges, and a distal end. The proximal end includes an inserter attachment element configured to removably receive an inserter instrument. The pair of flanges extends from the guide body and is configured to engage the spinal plate. The distal end includes a surface configured to contact an anterior surface of the interbody cage and a cage engagement element configured to extend distally from the surface and into a wall of the interbody cage. The coupling element extends through an aperture of the guide body from the proximal end to the distal end and is configured to draw the pair of flanges into greater contact with the spinal plate and the cage engagement element into greater contact with the interbody cage.
