Question on locations

Let me clear that up...

68 dodge dart, (1970) 318, A883, edelbrock performer intake manifold, aftermarket water pump.

I see the low oil pressure switch on the back of the block, I'm not gonna lie though, and I know it's stupid but... How do I connect the electrical wire to it? On the top or something?

As for the temp sending unit, I uploaded a pic of the one I bought, I read you can screw it into one of the little ports on the performer manifold?

Thanks for the help in advance