Installation and Usage Manual

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Well, there are different types of ROMs and ROM boards for the 1541, which is why I deliberately did not specify an exact connection.  The JiffyDOS ROM will have two wires connected to it.  One the lower left corner (opposite of the "notch").  That is ground.  You need to remove that wire permanently and attach the green wire to where other wire goes (which can vary depending on the ROM).