Yet
the converter leads need to be connected to 12V power as well as the Quadlock.
Not exact matches
I don't believe the ABS system requires more than 2kW (which would
need over a 160 ampere fuse), so a perfectly functioning DC - DC
converter should mean bad battery
lead contact should cause no ABS trouble.
In their place a robust
lead acid battery plus a DC to DC voltage stepup
converter can supply all the power and initial voltage
needed to start their respective engines via their crankshaft motor - generators.