Heretic Wraith wiring question

Hey I just got a 40 inch Heretic Wraith and it looks like they sent me the wrong wiring harness for it. They sent me the dual harness (this one):
https://www.hereticstudio.com/product-p/lbh-double.htm

Instead of the single (this one):
https://www.hereticstudio.com/product-p/lbh-single.htm

Am I right in thinking that I can just use this double and just wire tie up the extra lead for a future second LED bar (like maybe a bar on a future new T3 CBI metal bumper)?

Also, secondary question...the since the harness has only three leads to the switch and my OEM-look 3rd party LED Lighbar switch has four connectors, I just need accessory power via...say...an add-a-fuse (assuming I get all the leads correct)?

Thanks in advance for your accurate advice and cajoling.

 

You can just use one of the plugs on the dual harness and it’ll work just fine. As for your second light bar, just figure out what’s positive and what’s negative. If it has 4 connections, im assuming 2 are positive and turn the light on whenever they are connected. Then you should have one negative and one accessory wire

 

Thank you...I didn’t plan on a secondary light right away...the second question pertained to the switch wiring. I think your answer does apply though? Or at least it made some sense to me.

 

Yup, instead of wiring it to the switch you would just wire it directly to the harness before the relay. Use a 9V battery to see what's positive and negative so you know what needs to turn it on and off. then just splice the positive and negatives into the harness and you won't need the extra wire. Both lights will run off the same switch.