Okay dammit.
You have a couple of choices, and yes you’ll need a powered device to drive the speakers. If it was like you are thinking and you could just connect directly to speakers you’d have just ‘speaker wires’ with no connectors.

My bet is you have at least two and maybe three options for audio out. One is a hdmi port which requires an hdmi connection to some sort of digital to analog device like a sound bar or possibly a dvr or something. These ond option would be the RCA connectors, which are the output jacks and they are labeled L and R. This is an analog output but it is actually the ouut of a preamp and you need an amplifier of some sort, again like a stereo reciever. They’ll have the matching input jacks again labeled L and R.
Lastly, you may have an ‘audio optical out’ which uses a fiber cable but you need something toconvert it to from pcm to analog. Best Buy and others sell a cheap convertor for less than fifty bucksand it converts the optical pcm signal to analog and provides RCA output jacks, and again you need an a device with am amp to drive your external speakers.
The audio board is just a preamp. It shouldn’t be hard to replace (google it noob) but if you don’t want to mess with it, you’ll need a device like a stereo receiveror a sound bar to get sound out of it.

BkB