Spacer nut

An apparatus comprising a first spacer nut, wherein the first spacer nut comprises:

• a top surface along a longitudinal axis of the first spacer nut;
• a bottom surface opposite the top surface along the longitudinal axis of the first spacer nut;
• a front end along a lateral axis of the first spacer nut;
• a rear end opposite the front end along the lateral axis of the first spacer nut;
• a first side along a vertical axis of the first spacer nut;
• a second side opposite the first side along the vertical axis of the first spacer nut;
• an opening extending from the top surface to the bottom surface near the front end of the first spacer nut;
• an attaching member protruding from the rear end of the first spacer nut and configured for coupling the first spacer nut to a first auxiliary structure;
• a dovetail pin protruding from the bottom surface of the first spacer nut and extending from approximately a midpoint of the bottom surface of the first spacer nut to approximately the rear end of the first spacer nut and configured to couple the first spacer nut to a first battery spacer via a corresponding dovetail receiving slot on the first battery spacer.