the 'other end' of the wires is on the the six screws terminal strip of the ev100 card.
Battery powered forklifts do not use a frame "ground", and have wires from battery positive back to battery negative in every circuit, in fact one of the "first tests" PRIOR to ANY troubleshooting is to check to insure you do NOT have a 'short to frame' of less than 100k Ohms from any of the power cables.
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