Supernova explosions mark the final stage in the evolution of some stars. When the material ejected in the supernova interacts with the surrounding medium, a supernova remnant (SNR) is formed. Understanding how the ejecta in galactic SNRs diffuses back into the interstellar medium (ISM) and how these enrichment sources are spatially distributed is part of the critical path towards connecting nucleosynthesis to stellar chemical evolution in different parts of the Milky Way. I am currently working with data from the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2), one of the programs within the Sloan Digital Sky Survey IV (SDSS-IV). APOGEE provides high resolution, high S/N, infrared spectra for stars that constitute hundreds of thousands of lines of sight through the Milky Way. Combining the spectra with distances from parallaxes in Gaia DR2, the stars located behind the galactic SNRs can be used to identify absorption features from the ejecta in the SNR.