the outermost switch contact springs are guided by slots 260 and 261 the inner connector springs are guided by slots 259 in accordance with the invention at the left interior of the housing in fig6 the nonplanar switch springs 167 175 are received and guided by slots 262 and 263 both of these latter slots are open to a lower cavity 350 which accommodates the nonplanar springs and the contact 178 fig4 formed thereby housing 200 also includes a plug receiving cavity 250 in fig5 that is open at the front of the housing 200 cavity 250 also includes a key slot 252 which receives plug protrusion 180 fig4 if present the rear of key slot 252 is open to the backside of the housing into which the carrier 100 is inserted when the jack is assembled spring 175 of the nonplanar spring contact pair is visible in key slot 252 as shown in fig5 and accessible for movement by a plug protrusion 180 the rear of the plug receiving cavity 250 is defined by the opposite side of a wall 300 which contains the aforementioned slots 259 263 that receive and guide the connector and switch springs the middle slots 259 are of uniform depth for properly positioning the connector springs 162 165 and 171 174 fig2 slots pairs 260 and 261 are of more shallow depth and thereby act to bend the outermost switch springs more than the connector springs are bent in addition bosses 264 protruding from the back surface of the rear wall 300 push against springs 161 and 166 of.