yocto: psplash custom executables do not get installed

Depending on the detected hardware I need to start one of two executables of psplash with different images, so in my psplash_%.bbappend I have SPLASH_IMAGES = "file://bootscreen1.png;outsuffix=type1 \ file://bootscreen2.png;outsuffix=type2" And if I bitbake it, I find a psplash-type1 and psplash-type2 executable in the tmp/work/.../psplash/build as well as in package and packages-split and even in image, but it doesn't get included in the final rootfs (there I only find psplash-write). Do I really need to explicitly install the executables, while a psplash-default along with the psplash link is created automatically and the custom executables are also created magically?