Connectors for assembling modular building units

A connector system for rigidly interconnecting a plurality of modular units of a structure, the connector system comprising:

• a first connector configured for attachment at an attachment position of a first modular unit of the plurality of modular units, the first connector comprising a vertically extending retention clip, an alignment slot, and a channel;
• a second connector configured for attachment at an attachment position of a second modular unit of the plurality of modular units, the second connector comprising a retention tab, an alignment slot, and a channel, wherein the second modular unit is vertically adjacent to the first modular unit, such that the attachment position of the second modular unit is directly below the attachment position of the first modular unit when the connector system is in an assembled state;
• a third connector configured for attachment at an attachment position of a third modular unit of the plurality of modular units, the third connector comprising a retention clip and an alignment peg, wherein the third modular unit is laterally adjacent to the first modular unit, such that the attachment position of the third modular unit is directly beside the attachment position of the first modular unit when the connector system is in the assembled state;
• and
• a fourth connector configured for attachment at an attachment position of a fourth modular unit of the plurality of modular units, the fourth connector comprising a retention tab and an alignment peg, wherein the fourth modular unit is laterally adjacent to the second modular unit and vertically adjacent to the third modular unit, such that the attachment position of the fourth modular unit is directly beside the attachment position of the second modular unit and directly below the attachment position of the third modular unit when the connector system is in the assembled state;
• wherein the retention tab of the second connector is configured for vertical insertion into the retention clip of the first connector to resist vertical movement of the first connector relative to the second connector;
• wherein the retention tab of the fourth connector is configured for vertical insertion into the retention clip of the third connector to resist vertical movement of the fourth connector relative to the third connector;
• wherein the alignment peg of the third connector is configured for sliding engagement within the channel of the first connector to resist lateral movement of the first connector relative to the third connector;
• wherein the alignment peg of the fourth connector is configured for sliding engagement within the channel of the second connector to resist lateral movement of the second connector relative to the fourth connector;
• and
• wherein relative movement between the first, second, third, and fourth modular units is resisted by respective engagements between the first, second, third, and fourth connectors.