Engine wires that run to nothing/ Alarm issues

[GunnerLeigh]

2012 Pro Xs 200 S/N 1B935429
I bought this boat a month ago and the last trip out I had engine issues. While trying to diagnose this I discovered the previous owner had cut the alarm buzzer completely out of the boat. After unsuccessfully trying to figure out what that used the existing wire I found several wires and a harness in the cowl that weren’t hooked to anything. Does anyone know what these are for and how necessary they are to hook up. I worry that these wires have something to do with the alarm. This picture is the right front of the engine. My main concern is getting the alarm working so I can troubleshoot the engine issues more.

[JOE54]

all but red wire remain unhooked , those are for sender connections , not the cause of alarm , search on here for oil tank / low oil alarm test of engine tank sensor

[EuropeanAM]

+1

In regards to "cut the warning horn out"... make sure that you hear no "beep" at key-on. Some Smartcraft systems have pigtails labeled "horn" and can deceive you into thinking there is no horn there, when in fact it's for a low-depth warning that you likely do not have.