Thermostat no control on Blower

I don’t have a controller I was wondering these five wires seem to be coming from my wall and the four of them are the same colors that came out of the four wires that were on my existing thermostat does anybody know how I can Install the C wire adapter

have u checked to see if the 5th wire is behind the tstat, maybe wrapped around the cable?

also, if u have to install the adapter, do those wires run to wire nuts?

This is a very cropped image that doesn’t really tell me enough about your system to help you.