There is no standard for colours. Assuming that yours has the one-way guides on the back, ground is on the left (blue). Without the guides, it can go either way. Your battery connector also has ground on the left of the photo (black)). Never use the colours. You have to use the shape of the connector or a meter.
The connector end to end is the standard not the color wiring. They will only plug in one way (though I guess you could force them the wrong way) and to the same type of connector.
The connector end to end is the standard not the color wiring. They will only plug in one way (though I guess you could force them the wrong way) and to the same type of connector.