Two examples of the multi-wavelength data used to identify the NIRCam-SMGs for 450 μm (upper) and 850 μm (lower) detected SCUBA-2 SMGs. We show a F277W, F356W, F444W three colour NIRCam image centred on the SCUBA-2 position (a). In panel b we correlate the NIRCam F200W–F444W colour with the EaZy-pyA_V values for the NIRCam sources, where the marker size reflects the MIPS to F444Wp-value of the NIRCam source (lower p-value, larger marker) and the grey-dashed line indicates a colour of zero. Finally in panel c the Eazy-py predicted fluxes as a function of MIPS to F444Wp-values are shown. We also indicate the classical p-value < 0.1 threshold (vertical blue-dashed line) and observed 450 μm (850 μm) deboosted SCUBA-2 fluxes (red-dashed horizontal lines). NIRCam SMGs are identified, following the decision tree (Appendix A), by having high A_V, red colour, low p-values and EaZy-py predicted fluxes comparable to the SCUBA-2 fluxes in Zavala et al. (2017).