1990 ProCraft Stalker 160 bass boat need owners manual

[TennesseeRalph]

I recently purchased a 1990 ProCraft Stalker 160 bass boat and I need a copy of the owners manual that shows what all the switches do and hopefully how they are wired. Can anyone help me with this? Also, the temperature gauge does not work. I have replaced the temp sensor, but that made no difference. Does anyone know how it is supposed to be wired? I have attached pictures of my dashboard. There are several push buttons that don't seem to do anything and some have broked from the dashboard. What do these do? HELP Please.