To find the number 1 cylinder location, you'll need to:
1. Consult your vehicle's repair manual: This is the most reliable source. The manual will have a diagram showing the firing order and corresponding distributor cap terminal markings.
2. Look at the distributor cap itself: Many distributor caps have numbers (1, 2, 3, etc.) or letters (typically corresponding to the cylinder numbers) molded directly onto them. Sometimes these markings are faint.
3. Use the firing order: The firing order for a 1995 Chevy S10 V6 is usually either 1-6-5-4-3-2 or 1-5-3-6-2-4 (this can vary slightly depending on the specific engine). If you can identify the number 1 spark plug wire on the engine, you'll know the corresponding terminal on the distributor cap. The number 1 cylinder is typically at the front of the engine on the passenger side (but again, consult a repair manual or diagram to confirm).
Without a diagram specific to your engine, it's impossible to definitively state where #1 is located on the distributor cap. Using a repair manual specific to your year and engine is crucial for accurate identification.