There is no need to explicitly add links on your site to your Google+ profile, or to add a meta tag with rel="publisher" to your site's <head> section. Your IndieMade site takes those steps automatically for you. Just enter your Google+ page into the "Social Web" section as described in the Website Settings section of the handbook, and you're done.
However, you may still want to add a reciprical link from your Google+ profile to your IndieMade site. Sign into your Google+ profile, click Edit profile, click the Contributor To section, and then click Add custom link. Put your site URL in the box and then click Save.