Not a diagram, but if you go here
, where I have some detail on changing the rear sparkplugs (which requires removing the surge tank if done from above), there's a photo that points out the approximate location of the lines.
In summary, there are four lines connected the surge tank:
1. The brake booster vacuum line at the rear of the tank.
2. The purge line for the fuel evaporative emissions canister (which goes via the purge solenoid assembly to the evap. canister on the right).
3. The crankcase vacuum scavenge line which then splits to the right and left camshaft covers,
4. The thin manifold pressure compensation line running from near the throttle body to the injector fuel rail pressure regulator.
Is that what you are after? Can I ask what's behind the question?