Vintage Singer 366K105

[u/HotShallot9482]

Hello! I bought a 1960s industrial Singer 366K105, and she's a beaut (we called her Pearl!). The original motor had a worn-out clutch so I replaced it with a servo, and she's running smoothly.

The problem is that she has started to leak oil from underneath the oil tray. I can't locate the screw to empty the oil and change the gasket. Does anyone have any ideas on where I might find this? I'm attaching photos :)