Model 500B (via Aldi Discounter) uses _two_ lift hall sensors per wheel / different connectors

[plewka]

Other stuff of the set was matching nicely. But Yardforce now uses a dual sensor at this model's wheels, it seems.
They are using a 4pin connector per wheel with about the same mechanical size as the old 3pin connector (higher density).
Both are Y-connected to one 8pin connector which even means there are different original UI boards when looking for spare parts, now.

They printed the connector pinout to the PCB at the wheel. If the connector locking-nose is directed downwards and
you're looking from cable to connector, the pinout is VCC-GND-HA1-HA2.

[plewka]

At Discord Vermut explained how to simply plug the 3pin connector to the 4pin socket without issues.