How can I change the location that python binaries install to when building from source?

Question

I am using openSUSE Leap 15 and I'm trying to build Python 3.7.2 from source by following this guide.

In doing so, I've taken these instructions:

1. Download the archive

2. Extract the archive into /usr/lib64/ as root with

   # cd /usr/lib64
   # tar xvf /home/george/Downloads/Python-3.7.2.tgz
   

3. Run the setup commands as root

   # cd Python-3.7.2
   # ./configure --enable-optimizations --with-ensurepip=install
   # make -j 8
   # make install
   

These commands don't give me any errors, but they don't do what I expect them to do either. They're supposed to install the new python binary into /usr/bin/python3.7, however, that file is never created. Instead, the files are put in /usr/local/bin/ as follows:

# ls -l /usr/local/bin/ | grep python
lrwxrwxrwx 1 root root        9 Mar 31 18:18 python3 -> python3.7
-rwxr-xr-x 2 root root 14655464 Mar 31 18:28 python3.7
lrwxrwxrwx 1 root root       17 Mar 31 18:18 python3.7-config -> 
python3.7m-config
-rwxr-xr-x 2 root root 14655464 Mar 31 18:28 python3.7m
-rwxr-xr-x 1 root root     3099 Mar 31 18:29 python3.7m-config
lrwxrwxrwx 1 root root       16 Mar 31 18:18 python3-config -> python3.7-config

How can I get the binaries to go to /usr/bin/ instead?

I tried creating a symlink in /usr/bin/python3.7 to point to the one in /usr/local/bin/ but when I run it, I get an error:

# python3.7
Could not find platform dependent libraries <exec_prefix>
Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>]
Python 3.7.2 (default, Mar 31 2019, 18:10:07) 
[GCC 7.3.1 20180323 [gcc-7-branch revision 258812]] on linux
Type "help", "copyright", "credits" or "license" for more information.
Traceback (most recent call last):
File "/etc/pythonstart", line 7, in <module>
import readline
ModuleNotFoundError: No module named 'readline'
>>>

Trying to set up a virtual environment on this failed as well.

I considered moving all the python3.7 files that are in /usr/local/bin/ to /usr/bin, but I am concerned because python3.6 is already in there and each version has different other related binary files (like python3.7m-config).