Which adaptor did you buy, the 032 or 033? With the 032 the cross bar is removable, the 033 is bolted to the XL mounts. If you wish to remove the mounts and adaptor you will need a set of quick mounts.
adapts motorhome-mounted Blue Ox tow bars (Aventa, Aventa II, Aventa LX, Kar Bar, Aladdin, Alexxa, Acclaim) as well as Blue Ox “A frame” tow bars with one or three-pronged attachments to ROADMASTER brackets. They also adapt Demco Aluminator, Commander, Excalibar, Kwik-Tow and Dominator tow bars to ROADMASTER brackets.
has the same adaptibility as the 032 except that this adaptor is permanently bolted to the mounting bracket.
this adaptor does not fit MX or MS series brackets. Also, if you plan to use any ROADMASTER brackets with removable front arms, you will need quick-disconnects in addition to the adaptor.