I'm using the KOMA-script scrbook to write my document. I've customized to chapter headings to look like example 1 below (from this question). These are chapters with numbers. However, when using unnumbered chapters, the heading is pushed to the top of the page. How can I change it so, that unnumbered chapter headings ar at the same level as chpapters with numbers?
EDIT: I've simplified my code, so it just shows the relevant part.
MWE:
\documentclass[11pt, a4paper, numbers=noenddot, headinclude, chapterprefix]{scrbook}
\usepackage[left=30mm,right=20mm,top=25mm,bottom=20mm]{geometry}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[headsepline]{scrlayer-scrpage}
\RedeclareSectionCommand[
beforeskip=0pt,
innerskip=0pt,
afterskip=1.725\baselineskip plus .115\baselineskip minus .192\baselineskip
]{chapter}
\renewcommand\raggedchapter{\raggedleft}
\renewcommand\chapterformat{{\fontsize{80pt}{80pt}\selectfont{\thechapter}}}
\renewcommand\chapterlineswithprefixformat[3]{%
#2#3%
\vspace*{-.5\baselineskip}
\rule{\textwidth}{.4pt}\par\nobreak
}
\begin{document}
\chapter*{Abstract}
\chapter{Einleitung}
\end{document}