these might help
zerothread?id=163175or someone did a write up on a 93 dohc and this was said
P2Motorsport240sx wrote: S13 KA24DE (maybe others)MSD 6 series including SCI and SCI+ MSD coil, anyTach Adapter #8910Some type of high quality spark plug wires
green/black wire to stock coil, cut and connect to white MSD box and white Tach Adapter wires. red/black to stock coil, cut and connect to red MSD box and red tach adapter wires. orange MSD connect to positve coil terminal on any aftermarket coil(why use stock coil?). Black MSD connect to positve coil terminal on any aftermarket coil. Power wires Big Black(-) and Red(+) to battery terminals.
DON'T eliminate Control Modual that was mounted to stock coil, mount it some where out of the way. DON'T cut green wire loop on MSD Box