Yes, a 6-space MLO (Main Lug Only) panel in a detached garage fed from a house would require a main disconnect at the garage. This is due to the requirements of the National Electrical Code (NEC).Here's a breakdown of why: NEC 225.31 Disconnecting Means. A disconnecting means shall be installed where a feeder supplies a building or structure. NEC 225.32 Location. The disconnecting means shall be installed at a readily accessible location either inside or outside of the building or structure served.* Why a MLO panel needs a disconnect: A main lug only panel does not have a main breaker to serve as a disconnecting means.In short, the NEC requires a readily accessible disconnecting means at the detached garage to cut off power to the entire garage. This is for safety reasons, allowing someone to easily de-energize the garage's electrical system in an emergency or during maintenance.Therefore, you need to install a disconnect switch or breaker (in an enclosure) ahead of the MLO panel in the garage. This disconnect must be rated to interrupt the available fault current. Flag for review