Before re-wrapping the loom I applied some heat-shrink tubing over the connector to isolate it. After which it was fiddling the connectors back through the front panel’s hole (not easy with the headlamp motor in position) and reconnecting everything. A quick check revealed that the lights still worked but also that the coolant level light now switches of as it should.
First I went over all the suspension nuts and bolts. Most needed a little bit of tightening but nothing worrying. Only the nuts for the front struts lower ball joints needed more tightening. This is probably caused by the fact the struts themselves have been powder coated. And as this coating is wearing of through use, this gives some play between the ball joint’s stud and the mounting point on the front strut. Something to keep an eye on for the next few miles.