A modular cart for a gas turbine engine is disclosed. The modular cart may have a first cart with a first connection portion and a first mounting location. The modular cart may further have a second cart with a second connection portion and a second mounting location. The first connection portion of the first cart may be configured to attach to the second connection portion of the second cart. The modular cart may also have a cart component configured to interchangeably mount to either the first mounting location of the first cart or to the second mounting location of the second cart.