>>516123535 (OP)
left = some form of economic socialism (not just Marxian socialism)
right = some form of economic capitalism (not just laissez-faire capitalism)
authoritarian = some form of centralisation of power (not just dictatorship)
libertarian = some form of decentralisation of power (not just anarchy)
the Nazis had a mixed-market economy—some aspects of socialism, and some aspects of capitalism, making them broadly economically centrist
this is not taking into account the wartime footing of their economy for much of its existence, but is based on their pre-war economy, and speculative post-war economy as informed by their ideology
the Volkisch framing of their economic centralisation—that the people and the state are fundamentally one and the same, and that the entire economy should function in service of the Volk, is not dissimilar in practice to the modern day 'Socialism with Chinese Characteristics'—in other words, a form of State Capitalism
not socialist in the Marxist sense, but socialism is a very broad church—remember the word predates Marx
this puts the Nazis slightly left-of-centre economically
however, they were very, very authoritarian (which should be self-evident)
hence, they were authoritarian centrists, or possibly centre-leftists