in detail below a raised pressure plate 206 is provided on mating side 203 of attachment plate 202 in one preferred embodiment pressure plate 206 has approximately the same cross sectional area and more preferably approximately the same cross sectional dimensions as connector 254 pressure plate 206 is centered on mating axis 108 to be collocated with connector 254 when daughtercard 250 is mounted on attachment plate 202 importantly pressure plate 206 is the forward most contacting surface on attachment plate 202 as such pressure plate 250 is the only portion of attachment plate 202 that applies a force to daughtercard 250 when attachment plate 202 is secured to motherboard 300 shown in fig3 more specifically and as will be described in detail below attachment plate 202 transfers mating forces applied to attachment plate 202 to pressure plate 206 which in turn transfers the applied mating forces to the rear side of daughtercard 250 behind connector 254 because pressure platform 206 has approximately the same cross sectional area as connector 254 the applied mating forces are distributed evenly across the connector attachment plate 202 has a plurality of attachment screw spring assemblies 210 for securing the attachment plate directly or indirectly to the motherboard attachment screw spring assemblies 210 include an attachment screw 212 surrounded by an attachment spring 214 as is well know in the art motherboard 300 includes corresponding threaded holes 302 for receiving screws such as attachment screws 212 alternatively motherboard 300 can be mounted on a plate or other support structure that includes such corresponding threaded holes 302 attachment screw spring assemblies 210.