For the second and third K1 I skip over all pages other than for the variables you have already outlined?
On the original K-1, delete box 2 and box 16E. Leave the remaining entries as is. This K-1 is for business ( box 1) and passive category only.
Bring up a new K-1. Fill in Part 1. Ignore Part 2. In Part 3, insert the country in 16A and the amount into 16E. This is for general category only.
Bring up another new K-1. Fill in Part1. Ignore Part 2. In Part 3, insert the amount into box 2. This is for rental income only.