Figure 2-8: Jumper J3 Pinouts; Table 2-6: Jumper W6 - Datatech Enterprises Apex 386/25 User Manual

Speaker Connector (Jumper J3)
Jumper J3 is used to connect a speaker. When the four pins are in a
closed circuit, the speaker is functional. Refer to the figure below for
the pinouts of jumper J3.

Figure 2-8: Jumper J3 Pinouts

Video Selection (Jumper W6)
Jumper W6 is used to select display mode. Refer to the figure for the
settings.

Table 2-6: Jumper W6

10 Chapter 2: Setting Up your System
Jumper J3 Pinouts