Upper left panel: ¹²CO (J = 1 − 0) m-0, and lower left panel: ¹³CO (J = 1 − 0) m-0 maps overlaid with elected locations (S1—S4) to extract spectra and red colored path to extract the PV diagram in the velocity range [−4, 6] km s⁻¹ for KPS0620 along with YSOs (Class I (yellow asterisk) and Class II (green asterisk)). Right panel: ¹²CO (J = 1 − 0; blue color) and ¹³CO (J = 1 − 0; red color) spectra at the selected locations marked in the left panel. The green and yellow curves represent the Gaussian fit/s to these spectra. The vertical dashed (blue) line represents the ¹²CO Gaussian fit/s peak.