Bottom section of the first image is the speaker connection, top looks like midi, but lots of things used that kind of connector. Could even be for speaker separates from the woofer.
Second picture is too dark to see but I guess it's the other channel, or maybe the place to connect the stereo system.
They are 5 Pin DIN, and 2 Pin DIN sockets (the bottom left looks like a plug) used for audio. Someone HI FI enthusiast probably installed them in the 1980's so that they didn't have loose wires trailing all over the place.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local