I did the same thing - cut off the connector not thinking about the implications down the road. I'm Scottish, so rather than buy a new turn signal unit I used barrel connectors to attach the wires from the new harness (cut its connector off) to the ends of what I'd previously cut, matching color for color. I staggered the barrel connectors so they wouldn't be a fat knot in the middle of the run, but there was no way to get any of that down through the upper end of the steering column. So I wrapped it tightly in black vinyl electrical tape and zip tied it to the underside of the column.
Everybody has a cost/value threshold and that solution fit mine.
YMMV

A VW guy trying his hand at a '59 LB fs. Lots to learn, but it's about the journey.