The 95 and 96 DSMs have the cam angle sensor on the tbelt side of the motor, BEHIND the cam gear. You'll find the harness end of the wiring there. The 97-99 motors have the CAS on the passenger side of the head, same as 1G location.
You have two options. You can try to extend the wiring to the 99 CAS and use the wiring diagrams on
www.roadraceengineering.com to adapt them. Or if you you can swap the 2g CAS from the 95 head onto the 99 head. I believe the mounting provisions are present on ALL 2g heads. Then it would be plug and play, but you have to mess with the tbelt. USe the "RRE method" for doing cam swaps found on thier site, it explains how to use the tbelt tensioner tool (see the vfaqs for where to buy) and ziptie the cams to the gears so you dont alter the cam timing or tension.
Hope that helps.