Boost and pyro

My freightliner century only has 6 gauges.
Water temp
Oil psi
Volt
2 air
Fuel
I took apart the dash it has wiring for six more gauges can I cut out holes and install the pyro and boost n just plug and play or there is more to it. I have a 2004 century 14l Detroit I know the ecm reads boost for sure don't know about the egt in guessing it does too near the turbo because it has the sensors. I looked online where the boost n pyro is in the manuals and its left bottom side one shows pyro left and boost under the volt the other shows the pyro under volt and the boost next to pyro on left. I was wondering if anyone can help.

 

So I can plug it in to any of the free 6 spots and its gonn recognize what gauge it is and show boost or it's supposed to go to a specific free spot that I have.

 

I did not get a good look. I got my load canceled in Cincinnati and got stuck without a load over the weekend. So been messing with my truck and took apart the dash enough just to see that the wires are there but I didn't see if anything is labeled but their standard gauge is 4 wires or 5. My dads century has a boost gauge and its right under the volts. So on the left side of dash in the right row bottom is where his boost gauge sits. So I'm guessing all I need is to drill the hole on my dash n Put in the gauge. Because the housing with the light bulb n wires are right under the brown looking dash I have.

 

Ye I'm gonn get them all we got a junk yard in Portland they will give them to me dirt cheap. I wanna have a full dash since I got all the wires

 

But I really want the boost and pyro. those are very handy to have I think