Part of the process of spiritual development is integration – making connections between various aspects of our personality and combining them to make a more coherent whole. We tend to search for how things fit together, how they interact, how they contribute to the whole.
Psychological / emotional perspective: When we dream of connecting or combining two articles, for instance two opposing forces, we are attempting to dispense with duality and perhaps achieve a better use of energy.
Material aspects: Making connections in dreams can signify forming relationships. Missing a connection when travelling suggests that we have not linked timing and effort. Dreaming of combinations of things creates a composite, combining qualities from each of them.
For further clarity read the information on composite animals in animals, as well as the entries for journey and transport.