FIG 3 is a bottom view of one embodiment of secondary substrate having a solder pattern arranged to match {HEAD ~ the pre existing pattern} on {TAIL ~ primary substrate} 1 
FIG 3 is a bottom view of one embodiment of secondary substrate having a solder pattern arranged to match { HEAD ~ the pre existing pattern } on { TAIL ~ primary substrate } 1
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH