Existing seat belt mounting 70 C10

[mwildman]

I've searched the posts and vendor product data but don't have a clear answer.
Do 70 C10s have factory mounting holes in place to add 2 point seat-belts?
Is it as simple as ordering new/correct seat-belt model and bolting it in?

It's a stipulation of the seller that if/when she does sell me her truck, that I can't drive off until I have a seat belt installed.

It does have a cap in, for what assume is the 3-point mounting location, see image.
Is it safe to assume that the other mounting locations are in place?

Thanks for your time,