The battery box cover is a Series 2 item, so should be available on cars being broken.
The tubes direct any water and gasses out of the Ecu and battery boxes, out via the bottom of the front panel.
Are they important? Not really, but desirable, availability...possibly from cars being broken.
91 3.0 sei M. 4852 EXY Black
92 2.1 sed M. 5740 ECZ Sable Phenicien
92 3.0 V6-24. 5713 EXY Black
92 2.1 sd M. 5685 ENT Blue Sideral
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90 2.1sd M. 5049 EJV Mandarin
92 2.1sd A. 5698 EJV Mandarin
94 2.1sd A. 6218 ERT Triton
91 2.0si M. 5187 EWT White