It takes a few steps, because you need the local samterm
talking to the same plumber that your remote B is.
See import(4) (9 man 4 import):
EXAMPLE
Suppose you run sam -r to the CPU server anna. Sam wants to
talk to a plumber on the local terminal, but the file names
will refer to files on anna.
To fix this problem, create a new name space directory and
start a new plumber on anna:
remotens=/tmp/ns.`whoami`.on.`hostname`
ssh anna mkdir $remotens
ssh anna NAMESPACE=$remotens plumber
Now import that plumber to the local name space before
starting sam and 9term:
NAMESPACE=/tmp/ns.anna
mkdir $NAMESPACE
import -n $remotens -s plumb anna
sam &
9term ssh anna &
In the shell running in that final ssh you will need to set $NAMESPACE too.
(To /tmp/ns.you.on.localmachine)
Russ