A splice plate for adjustable angled connections between adjacent sections of cable bus enclosures having a first portion for adjustably connecting to a first siderail of a first cable bus enclosure, and a second portion for connecting to a second siderail of an adjacent second cable bus enclosure; at least one straight slot included in said first portion for receiving a connecting bolt to interconnect said first siderail and said plate, wherein a position of said connecting bolt within said straight slot is movable to allow changes of connection angle; at least one arc slot included in said first portion for receiving connecting bolts to interconnect said first siderail and said plate, wherein a position of said connecting bolts within said arc slot is movable to allow changes of connection angle in cooperation with said straight slot; whereby an angle of connection between said first and second cable bus enclosures is selectively adjustable by changing the position of said connecting bolts in said slots on said first portion of said plate.