Fuel pump relay location
Does not matter. Main thing is that the wiring to the relay contacts is fused close to the source and large enough for pump current. Same with wire from relay to pump
Keep in mind "this is a good time" to think about oil pressure and or crash switch, and or a security (anti theft) switch in the coil (trigger) circuit
Also keep in mind many replacement relays are not particularly water resistant, so underhood "splash" might be a problem
Also check the relay coil for protection diodes. The "Bosch" copy / look alike relays seem to come both ways. If you hook the coil up reversed, you create a dead short
The way this one is wired, pin 86 MUST be positive, and 85 must be ground
http://www.bcae1.com/images/jpegs/IMG_7451b.jpg