How do i add lines of code to .htaccess?

Hi there – very new to all this so please forgive me. 😛

I installed WordPress and the Avada theme, onto GoDaddy (I already regret using their services). Anyway;

Avada is telling me I need to do the following:

-Increase PHP Time Limit (max execution)
-Increase Max Input Vars

I have the two lines of code that need to be added to .htaccess …but I don’t know where in the file to add the two lines of code

the two lines of code are:

php_value max_execution_time 300
php_value max_input_vars 1500

My .htaccess file looks like this:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

So where in all that do my additional lines of code go?