If you slide under the RV on a creeper you can probably trace the hydraulic lines back to the pump. I had the same situation on my RV when I got it.
As for HWH, I have lost any interest in dealing with them. The call back time for technical support is crazy. The last time I called I waited about a week for a call back. When I finally gave up on getting tech support assistance, I called and just wanted to order the part I thought I needed. I was told that I would have to wait for a call back from the parts department because they were also backed up. I asked how long that would take and was told a couple of days. That is crazy. I ended up calling Stuart's Services which sells all of the HWH parts. They pick up on the first or second ring, answer all your questions just like HWH and can ship your part out the same day. I ended up getting the part from them to my house before I even received a call back from HWH. And their prices are the same. Good luck.