Relay with Clutch and switch

You should use the little button on top of the clutch for the cruise control/HICAS (if equipped) which gives out a negative trigger.   https://www.the12volt.com/relays/page5.asp  Second diagram there explains how to do a constant output out of a momentary. You have to hook a relay onto the clutch switch though to convert the polarity to positive (as your clutch switch will activate the fused 12VDC) and then use your momentary switch as the negative pulse. (The additional relay will have 12VDC at 85 and 30, clutch switch output at 86, and then your fused 12VDC comes out of terminal 87) That should do it.