Final IGRINS spectra. Representative IGRINS H- and K-band spectra of two RGB stars in each GC in air wavelengths: Star 1 and Star 2 for Patchick 126 (left panels), and Star 5 and Star 10 for VVV-CL160 (right panels). For clarity in the plot, we have shifted the relative flux scale of Star 2 and Star 10 vertically with additive constants, and show zoomed spectra between 16 000 and 16 350 Å in the H-band and between 22 000 and 22 350 Å in the K-band. We identified some spectral features (Si I, Ca I, Na I, Fe I, Ti I and C¹²O¹⁶).