Change round parentheses around the type into square ones

I am making the bibliography using the package apacite as it is working very well (in my opinion). There were just some issues in the translation (using babel package) which I redefined to make sure the translation is what it has to be.

Now I have one little issue still: the type of the source is printed between round parentheses "(" and they should be square "[". Redefining with

\renewcommand{\BBOP}{[}
\renewcommand{\BBCP}{]}

didn't make sense as all brackets turned into "[" (even those who had to stay "(" ) except those that I wanted to change.

Is there any comparable command to change the parentheses around the type of source??

My code:

\documentclass[12pt,a4paper,twoside,openright]{book}%

\usepackage{a4wide}
\usepackage[dutch]{babel}
\usepackage{url}
\usepackage{apacite}
\bibliographystyle{apacite}
\usepackage{tocbibind}

\AtBeginDocument{ %to adapt the wrong translation
\renewcommand{\BRetrieved}[1]{Geraadpleegd op {#1} via\ }
\renewcommand{\BRetrievedFrom}{Geraadpleegd via\ }
\urlstyle{same}
}

Now I get:

Claessens, T. (2015). Toegepaste stroming- en energieleer (Syllabus). Universiteit Gent, Faculteit Ingenieurswetenschappen en Architectuur.

And I want to have:

Claessens, T. (2015). Toegepaste stroming- en energieleer [Syllabus]. Universiteit Gent, Faculteit Ingenieurswetenschappen en Architectuur.

The bib entry is as follows:

@TechReport{Claessens, 
   author = {Tom Claessens}, 
   title = {Toegepaste stromings- en energieleer}, 
   institution = {Universiteit Gent, Faculteit Ingenieurswetenschappen en Architectuur}, 
   year = {2015}, 
   type = {Syllabus} 
}