That is usually the case with the Beogram 4000 for some reason.  Perhaps because it is older (I have had to repair a couple of cartridge connectors on Beogram 4002 turntables) but maybe B&O improved the connector later on.  In all of the repairs of this type that I have done the bottom piece has been good while the upper part is the one cracked/broken.

John

Well.....after all this time we're back on the road, holidays and covid where the culprits, this turned up today!

Some tricky soldering to be performed...…..

I suspect I have pubic hairs thicker than these tonearm wires......total nightmare removing the insulation without removing any of the strands, resorted to melting the insulation with the soldering iron and teasing it away......everything tinned and ready for soldering.

Soldered up nicely..............

And, in accordance with accepted practice, a blob of "arleenes tacky glue" to help ease any stress on the solder joints during re assembly. 

joined both halves together and put a blob of glue on the earth wire

Offered up the cartridge..........

It's a nice fit....sanded it a little to get a good fit in the tone arm