MP3 Player (SanDisk Clip Sport) – SD Pin Layout
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Orientation: pads facing you, headphone jack on the right.

Outer row (edge side, right → left = Pins 1–4):
 ┌───────────── Edge of board
 │ [1] DAT2   [2] DAT3/CD   [3] CMD   [4] VDD
 └───────────── Towards board center

Inner row (board side, right → left = Pins 5–8):
 ┌───────────── Edge of board
 │ [5] CLK    [6] GND    [7] DAT0    [8] DAT1
 └───────────── Towards board center

Note: Inner row counts backwards (start at headphone jack, count 5→8).

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Keefe Score 7T Tablet – 9 Test Pads (Top → Bottom)
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Vertical pads on mainboard:

 [1] DAT2
 [2] DAT3
 [3] CMD
 [4] VDD (3.3V)
 [5] CLK
 [6] GND
 [7] DAT0
 [8] DAT1
 [9] Card Detect / NC

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Bridge Mapping (MP3 → Tablet)
==============================================
Connect like-to-like signals:

 MP3 [1] DAT2   → Tablet [1] DAT2
 MP3 [2] DAT3   → Tablet [2] DAT3
 MP3 [3] CMD    → Tablet [3] CMD
 MP3 [4] VDD    → Tablet [4] VDD (optional if tablet already powered)
 MP3 [5] CLK    → Tablet [5] CLK
 MP3 [6] GND    → Tablet [6] GND
 MP3 [7] DAT0   → Tablet [7] DAT0
 MP3 [8] DAT1   → Tablet [8] DAT1

 Tablet [9] Card Detect – usually left unconnected.

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ASCII Notes
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MP3 pad rows (viewed facing you, jack on right):

 Outer:  [1][2][3][4]
 Inner:  [5][6][7][8]

Tablet pads (vertical stack):

 [1]
 [2]
 [3]
 [4]
 [5]
 [6]
 [7]
 [8]
 [9]

Be careful with orientation:
- MP3 outer row (edge) goes 1→4 right to left.
- MP3 inner row (board center) goes 5→8 right to left (reverse order).
- Tablet pads are simply top to bottom, 1→9.