da come spiega il sito nippynormans esistono 2 modi per collegare il MAGNUM:
TIP FOR OWNERS OF BMW MOTORCYCLES WITH THE CAN BUS SYSTEM
When fitting the Magnum horn to these bikes there is no adverse effect on the Can-Bus system. There are two methods of connection:
1. Cut off the original horn connector and attach spade connectors to the two lose wires. These then connect onto the Magnum horn
(spade connector sono dei semplici faston)
OR
2. Use our Hard wiring kit for BMW bikes with Can-Bus wiring.
(cioè questo utile nel caso non si voglia manomettere i cavi e ripristinare in un secondo tempo)