What kind of screw holes are these? This is a Pioneer FH-X840DAB unit : r/CarAV
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User manual Pioneer FH-X840DAB (English - 204 pages)
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Pioneer FH-X840DAB user manual (English - 204 pages)
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User manual Pioneer FH-X840DAB (English - 204 pages)
User manual Pioneer FH-X840DAB (English - 204 pages)