and 32 b at a rearward location and by the use of a splice bar 2 sa at a forward location in the alternative the backing bars 32 a and 32 b washers 100 and bolts 108 can be loaded into the backing bar slots 64 and the splice plate 30 a and associated hardware can be installed and secured as indicated in different stages in fig1 to draw the slotted frame cabinet 26 a and the slotted frame cabinet 26 b together in a suitable manner such actions also align the fronts of the slotted frame cabinet 26 a and the slotted frame cabinet 26 b and the backs of the slotted frame cabinet 26 a and slotted frame cabinet 26 b the capture of the splice bar 28 a between the slotted frame end 44 c of the slotted frame cabinet 26 a and the slotted frame end 44 b of the slotted frame cabinet 26 b provides for vertical connection in part of the slotted frame cabinets 26 a and 26 b vertical connection between the slotted frame end 44 c of the slotted frame cabinet 26 a and the slotted frame end 44 b of the slotted frame cabinet 26 b is completed by the use of the splice plate 30 a the steps of which have just been described fig1 shows the use of multiple splice plates 30 a and 30 b backing bars 32 a 32 d and associated components to in part suitably connect horizontally adjacent slotted frame cabinets 26 a and 26 b as previously described horizontally adjacent slotted frame cabinets 26 c and 26 n are connected using like components in.