Shane/Kast blue and red optical spectra (black lines) of TOI-5713 (top) and TOI-6002 (bottom) compared to their best-fit M4 SDSS standard templates (magenta line; Bochanski et al. 2007). Data are normalized at 7400 Å, and the gap between 5600 Å and 5900 Å in the spectrum of TOI-6002 corresponds to the dichroic split between the Kast blue and red channels. Key spectral features across the 4200–8900 Å region are labeled. Inset boxes highlight the regions around the 6563 Å Hα and 6708 Å Li I lines.