Plug connector

The plug connector command combines an input connector and an output connector to a closed connector. Simply move one of the two connectors over the other until the color of the unmoved connector changes to green and release the left mouse button. If the color changes to red instead, something is wrong and the plug command cannot be performed. Possible causes for a mismatch are
 * You try to connect two connectors of the same type (input connector to input connector or output connector to output connector)
 * The size of the connectors is not the same, e.g. the input connector has three input neurons, the output connector has four output neurons.