The standard install is for gcl.
You can just leave maxima where you built it, or move the directory...
To invoke maxima you must tell it where the documentation and files are
the easiest is to set an environment variable and then invoke the command.
You can make a shell script:
eg:
==================maxima==============
#!/bin/bash
export MAXIMA_DIRECTORY
MAXIMA_DIRECTORY=/directory-where-i-put-it/maxima-5.6
exec clisp -M ${MAXIMA_DIRECTORY}/src/maxima-clisp.mem
=====================
===============xmaxima===================
#!/bin/bash
export MAXIMA_DIRECTORY
MAXIMA_DIRECTORY=/directory-where-i-put-it/maxima-5.6
exec ${MAXIMA_DIRECTORY}/bin/xmaxima -lisp clisp
============================