To find it definitively:
1. Consult your owner's manual: This is the best place to start. The manual should have a diagram of the fuse and relay boxes showing locations and labeling of each component.
2. Locate the underhood fuse box: This is usually a large plastic box near the battery.
3. Look for a diagram inside the fuse box lid: Many fuse boxes have a diagram printed on the inside of the lid. This diagram shows the location and function of each fuse and relay. Look for a relay labeled "starter" or something similar. Sometimes the diagram uses symbols, not words.
4. If you can't find it in the fuse box, search the nearby area: Check for additional relay boxes or panels that might be mounted on the inner fender or firewall.
Without your owner's manual, pinpointing the exact location is impossible. If you don't have the manual, you can often find a free PDF version online by searching for "1995 Pontiac Bonneville owner's manual" + your specific engine size (e.g., 3.8L). Using a reliable online parts store's website and entering your vehicle's details could potentially provide a diagram too.