Has anyone considered doing a Liqui Moly Diesel Purge?
It's supposed to be fed directly into the main fuel line going into the engine, and then back out with a small inline filter into the same purge container, and the engine reved between 2-3K until all used up.
However when I looked under hood recently, I believe there are 2 main fuel lines on the left above the air intake filter box, and one return going back to the filter under the car near the fuel tank.
Any ideas on how best to do this and how best to temporarily connect it all up?

I'm thinking of taking the blue and yellow incoming fuel lines and adding a bit of hose with a T-junction inline connector leading to a single pipe connected to the single white return fuel line, to form a closed loop back circuit to the fuel filter - or pulling the fuse for the fuel pump.
Then just just dunk the blue and yellow hose leading to the engine in the diesel purge container to suck it up, and a inline small filter on the return white fuel line with an extra bit of hose on the other side to bring the returned in used fuel back into the diesel purge container.
What do you think? What could go wrong?