The 949 is an antenna tuner.
To make it accessible, you will need an external swr meter that is
accessible. This could be a meter such as the LDG PW1, or a meter adapted
with an audible circuit which would decrease the pitch of a tone as the swr
became lower.
Manuals in pdf format are on the mfj website. Other than the drawings, they
usually read pretty well with Adobi.
K5XU