Banana,
...correct, use the return line low pressure..
and...
The red clip might be seen at the end of line #7 in the diagram --- BUT, it does not come with the line as a part -- as said before it comes with the pump reservoir.
There are also 2 rubber O-rings on the line that actually seal the line to the pump --
when the plastic clip melts the line is pushed out of the pump by low pressure and sometimes leaks before it finally comes out of the pump and blows PS fluid all over the engine and exhaust ( lots of blue smoke !!).
Besides the PS cooler we also added a small metal bracket on the return line at the back of the pump -- if the plastic clip fails again the line will remain in the hole and not leak.
FWIW...
Ed
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