Well spotted Jef
This may be of a little more help

This is also their only mention in the OH
"The 74th Division, which was to direct, had as objective the line of works east of the railway, after which it was to cover the right of the 60th Division, seize the high ground north of Tell esh Sheria, and protect the water supply. The 60th Division and one brigade of the 10th were then to cross the railway and capture the trenches west of it to a depth of two miles. The remaining brigades of the 10th Division were held in corps reserve. The heavy artillery consisted of the 15th and 181st Heavy Batteries, the 378th, 383rd and 440th Seige Batteries, under the orders of Br-General A H Short, GOC. RA. XX Corps."
XX Corps Order No. 13 (5th Nov 1917, issued 8.30 am) does not tell us very much either, but simply says in Item 5
"The Heavy Artillery Group, less 1 60-pdr. battery attached to 53rd Division, will move into positions north of the Gaza-Beersheba road to support the attack under the orders of the GOC RA XX Corps, who will allot objectives to the Group Commander."
Good luck
Michael