Have I understood correctly - you are looking for a vertical antenna which you will put up and take down as you need to use it?
I presume in that case that the sky dish bracket is on the side of your balcony - not on the roof of the building?
The SE-HF-360 is a fibreglass version of the aluminium SRX-80 (now SE-X80) ( https://www.ebay.de/p/2258774426?iid=221688113685&thm=1000 ) of which I have had two. They are an “OK” antenna but not something that I would like to have to put up and take down regularly - it’s a very long antenna that would whip around in the wind!
How much access do you have to the sky bracket? What I would suggest is considering something far shorter in the form of a loaded mobile whip and the one I am thinking of is from the Spanish KomunicaPower company - the HF-Pro2. In the UK it’s supplied by Lamco in Barnsley.
Take a look at this as an option. You tune the band you want to use it on by sliding the housing of the loading coil up or down as needed. It works well on 40m through 10 metres - I’ve never tried mine on 6 metres. You don’t need an ATU with this but you have it in the KX-3 anyway.
I use one of these if I am going to a summit with limited space or that I know is very busy. I built my own tripod and radials but I know Komunica are about to come out with something similar that could be of interest if you need it. Otherwise, you need to modify that SKY dish bracket to take an SO239 mount and coax and then string a few wires off it to act as a ground-plane as this antenna is really designed to be operated from a parked car or camper van with a mag mount on a metal roof. Perhaps a CB-wing mirror SO239 mount could clamp onto the SKY mount? Ask the guys at Lamco.
73 Ed DD5LP / G8GLM.
To be clear if you are looking for an antenna to put up and leave and never adjust - this is not suitable (it’s not meant to be out in all weathers).
If you are looking for an antenna that you put out when you need it and can adjust it’s tuning easily (e.g. from your balcony in an appartment block) this might be a good solution for you.