HP E27m G4 Maintenance And Service Manual page 20

The connectors are on the main board (board part number CBPCPD9H1Q1)
The connectors identifiers are as follows:
Connector
HDMI
DisplayPort 1
DisplayPort 2
USB Type-C
RJ45
USB 3.0
CN501 CN502 CN101 CN503 CN105 CN103
This procedure includes audio connectors.
The connectors is on Audio board (board part number AUPCPQA5)
The connector identifiers are as follows:
Connector
Audio
18
Location
CN501
CN502
CN503
CN101
CN105
CN103
MAIN BOARD
Location
CN610