There is no one that can tell you specifically what metals and amounts are in converters. They all vary based on what they were designed to do. Even the most technologically advanced processor has to use the law of averages in the end. Then there's the metals split, the share of the metals the processor will take from your lot.
The only profitable way to work the "converter game" is to buy them cheap and maximize your returns with secondary refiners. This means you have to invest a considerable amount of money and time to learn what works and what doesn't. Unfortunately, most people providing information are also looking to profit. This will ultimately make collecting tedious to say the least.
If your not prepared to go down that road yet, please sell to the highest bidder. That's the safest way. This info is free. I don't want your cats! Good luck my friend!