Negative ground cables from a 2000 Safari (maybe Savannah) van. 6 gauge chassis and 0 gauge block connection (shortened several feet). Positive cables from 2006 Trailblazer. 6 gauge connection to starter (same length and size as 3rd gen factory), 6 gauge with fusible link to alternator, and 6 gauge to screw connection where 3rd gen factory harness connects via original alternator cable and allows for other aftermarket power connections.