15HP Mercury - how to 'hotwire'?

I bought a ca. 1998 ELRC (electric starter) without wiring / switch / remote controls. Before I invest in such I would like to test the outboard:

Is it possible to run it without a battery, using the manual choke / pull-start?
if so, how to wire it up for the testing?

Six wires go to the plug:

I guess that some of the cables are to be shorted, but which?
Help is much appreciated!

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