Commodore Amiga A500 Technical Reference Manual page 113

The expanded B2000 video slot is a 36 pin edge connector, the same
type as used on the 16 bit IBM style bus extension.
PIN Signal
Ground
R 1
Ground
G
l
Ground
B2
Composite Video
CDAC Clock
/C3 Clock
ILPEN
SEL
PDO
PD2
PD4
PD6
/LED
Raw Audio Left
Raw Audio Right
PIN
Signal
R0
R2
GO
G2
B 1
Ground
TBASE
POUT
BUSY
IACK
Ground
PD 1
PD3
PD5
PD7
Ground
Audio Ground
Audio Ground