I went exploring in my storage bays today and came up with three questions.<br/><br/>#1) See photo #1 - How do I turn this light on? There is not a switch on either end.<br/><br/>#2) See photo #2 - What is this rectangular metal box with a knob on top?<br/><br/>#3) See photo #3 - What is this gauge for?<br/><br/>Note: All photos were taken in the third bay aft of the driver side wheel