ECM connector plug disassembly?

Hi, KHlow. What I was looking for was how to remove a single terminal from a large connector plug that plugs into the ECM. It's a tiny female terminal that slides onto a pin terminal on the ECM. That type isn't covered in the. Pdf manuals I can find. I have since been able to remove it (with a flattened-tip paper clip), but the problem NOW is that it's so tiny I can't even see how it's made, in other words if it is making good contact. I have a check engine light code P0135 (Oxygen sensor heater performance). I have replaced the sensor, checked the 4-wire plug at the sensor, and am trying to check the connection to the ECM of the return wire from the heater. If you had anything about that type terminal (picture, description) that would tell me how it makes a good internal connection, how to adjust it (with a pin maybe), if it's possible to adjust it, etc, that would be a big help. Thanks.

Thanks, KHLow, I think i've got it now. The paper clip test tip was helpful.