B141: Immobilizer
Connects to immobilizer under dash.
For use with RFID inside modern Subaru keys
B142: Immobilizer Antenna
Self Explanatory
B176: Keyless Entry Module
Self Explanatory
You can probably delete this if you really wanted to. Probably more work than it's worth and is handy to have for arming the factory alarm
B198: Ground Terminal
Convenient way to ground multiple wires to a single chassis point
B200/B61/B100/B108/B62: Bulkhead to Front harness
Connects bulkhead harness to front harness/fusebox
B208: Glove Box Light
Delete
B243: Security Horn Relay