Frankazoid

1) Grey 14 pin connector with red and black wire rolled up, labeled 10 amp switched- what does this connect to/plug in to?

2) what connects to: yellow 9 pin connector?

green connector with blue wire?

green connector with black+red wire?

3) what is the single black wire that splits in to 2 with tape wrapped on end?

All of the above are diagnostic connectors. The green connectors are plugged together to put the ECU in D-Check mode, the grey and yellow connectors are for the Subaru Select Monitor (SSM) - it's a dealer tool that provides more functionality than the OBD port and also interfaces to the ABS computer, TCU, SRS, etc. The taped up black wires are factory ground pins that are provided to be inserted into the grey connector to put the system into certain test modes. The rolled up wire is the power for the SSM port. You can hook it up if you like or just leave it alone - it will run either way.