If they're Amp connectors, look on the front and back for a molded part number. A lot of times it will be there, but really small. Even if you just get the insert number, that would help. A full part number would be something like MS3106A22-14S. 22-14 is the insert number which describes the arrangement and number of pins. S is for socket (P is for plug), and the MS3106A part describes the rest of the connector. Mouser has them. If they're real expensive, I've found surplus ones on ebay for less, but that can be hit or miss.