I have resized your pics so they display correctly...
Brake booster hose goes to a fitting on back of carb or manifold that has access to full engine vacuum.
Ground battery cable..."negative lead" goes to any clean, engine accessory bolt hole point suitable and close enough for the cable to reach...
the ground system is essential on these older trucks...
The cab should be grounded to the chassis.
The chassis to the bed.
The engine to the chassis.
Radiator support to the chassis.
Have fun...good looking truck....stick to it...
BTW...You will need a fan shroud on that truck...
