You'll need a wiring schematic to identify what those wires in the clip are for. then you can identify the circuit or device they are powering causing your drain.

 

Using a test light to measure a parasitic drain is useless because modern vehicle normally have a amperage draw to keep the PCM and other modules alive.
An ammeter will tell the exact amount of the amperage draw which could be normal which is typically a few hundred milliamps amps to possible and amp depending on the vehicle.

Looks like that plug could be supplying power to a device or bunch of devices.
Best thing to do is plug it back into the fuse bank then pull each fuse one at a time until there's a drop in the amperage draw but you really need an ammeter connected in series with the battery's Neg post and ground.
The fuse definition will indicate the circuit thats at fault.

When you do this make sure the ignition is off, all doors closed and make sure the dome light is off as well as the open hood light is off if it has one.
Also be aware some modules could take a while to go to sleep.