It wont get hot enough for SVO, it was an anti waxing solution with the older diesel for winter running, i had one on my 88". Power from ign sw to the temp switch in the filter head, from there to the element, from the element to earth.
Peugrot 205/305 had a fuel filter with a bottom bowl that was.water jacketed and plumbed into the heater(IIRC) circuit to have the same effect.